CN210021575U - Flue gas treatment system suitable for garbage mineralization furnace - Google Patents
Flue gas treatment system suitable for garbage mineralization furnace Download PDFInfo
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- CN210021575U CN210021575U CN201920454317.0U CN201920454317U CN210021575U CN 210021575 U CN210021575 U CN 210021575U CN 201920454317 U CN201920454317 U CN 201920454317U CN 210021575 U CN210021575 U CN 210021575U
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Abstract
The utility model relates to a flue gas treatment system suitable for a garbage mineralization furnace, which comprises a flue, a dust falling device, a water washing device and a catalytic device; the dust falling device is arranged inside the bottom end of the flue and comprises a screen unit and a turn-back convolution unit, the screen unit is used for filtering flue gas, and the turn-back convolution unit is arranged above the screen unit and used for falling dust to the flue gas; the water washing device is arranged outside the flue and comprises two water tanks filled with alkaline reaction agents and used for washing the flue gas; the catalytic device is arranged inside the top end of the flue and comprises a heater and at least three flue gas catalytic reactors for carrying out catalytic treatment on the flue gas. This flue gas processing system can directly handle the higher flue gas of temperature, need not to the flue gas cooling to easily clearance and maintenance can effectively purify the flue gas that the mineralization process produced, reduce the pollutant and discharge into the atmospheric environment, help reducing air pollutant.
Description
Technical Field
The utility model relates to a refuse treatment technical field especially relates to a flue gas processing system suitable for rubbish mineralizer.
Background
At present, garbage in remote areas such as rural areas, scenic spots and the like does not have a system effective treatment mode, leachate and landfill gas are easy to generate during landfill, the odor is heavy, and secondary pollution is caused to cultivated land; toxic and harmful gases, particularly dioxin, are easily discharged by burning. The mineralized garbage treatment adopts a low-temperature mineralization mode to treat the garbage, the working temperature is lower than the generation temperature of dioxin, the dioxin is not generated in the mineralization process, and the treatment mode is more environment-friendly. However, during the process of refuse mineralization, a large amount of particles, tar, CO (carbon monoxide), CH (hydrocarbon) and NO are still generatedx(nitrogen oxide) and the likeThe exhaust of material, these flue gas directly discharge to the atmospheric environment in, can cause atmospheric pollution, for example cause haze etc. difficult environmental protection.
When the flue gas is usually dedusted, the bag-type filter element made of the fiber braided fabric is used for collecting solid particles in the dust-containing gas, the scheme is difficult to adapt to the flue gas with higher temperature, and the flue gas generated by mineralization treatment cannot be directly dedusted. And dust removal cannot eliminate harmful gases contained in the tail gas.
Therefore, a flue gas treatment system capable of effectively reducing particulate matters, tar and the like in flue gas generated in the mineralization process and converting harmful substances in the flue gas into harmless substances is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can directly carry out the dust fall to the high temperature flue gas that mineralize mineralization rubbish process produced and handle to can change harmful substance's flue gas processing system, particulate matter, tar, CO, CH and NO in the prevention flue gasxAnd the like are discharged into the atmosphere along with the flue gas.
In order to achieve the above object, the utility model provides a flue gas treatment system suitable for rubbish mineralizer, include: the device comprises a flue, a dust falling device, a water washing device and a catalytic device;
the flue discharges smoke from bottom to top;
the dust settling device is arranged in the flue and comprises a screen unit and a turn-back convolution unit; the screen unit comprises at least one single-sheet screen used for filtering the smoke; the turning-back convolution unit is arranged above the screen unit and comprises at least two turning-back plates, one turning-back plate is arranged on one side in the flue, the other turning-back plate is arranged on the opposite side in the flue, and the turning-back plates are arranged at intervals along the flue smoke outlet direction and are inclined towards the flue smoke outlet direction;
the water washing device is arranged outside the flue and comprises two water tanks filled with alkaline reaction agents; each water tank is provided with a smoke inlet channel and a smoke outlet channel which are arranged at intervals, one end port of each smoke inlet channel is arranged outside the water tank, the other end port of each smoke inlet channel extends into the position below the liquid level of the alkaline reaction agent in the water tank, one end port of each smoke outlet channel is arranged above the liquid level of the alkaline reaction agent in the water tank, and the other end port of each smoke outlet channel is arranged outside the water tank; the smoke outlet channel port of one water tank is communicated with the smoke inlet channel port of the other water tank through a connecting flue; the smoke inlet channel port and the smoke outlet channel port which are not communicated with the connecting flue are respectively communicated with the dust falling device and the catalytic device;
the catalytic device is arranged in the flue and comprises a heater and at least three flue gas catalytic reactors; the heater is arranged below the flue gas catalytic reactor and used for heating the flue gas entering the flue gas catalytic reactor; the inside of the flue gas catalytic reactor is of a porous honeycomb structure and is attached with a catalyst.
Preferably, the dust fall device is communicated with the water washing device through at least one fan, and the water washing device is communicated with the catalytic device through at least one fan.
Preferably, the fan is communicated with the dust falling device, the water washing device and the catalytic device through an auxiliary smoke pipe.
Preferably, the device also comprises a controller and a smoke detector; the smoke detector is arranged at an outlet at the top end of the flue and used for detecting smoke exhaust components, and the controller is electrically connected with the smoke detector and the fans and used for generating control instructions according to the smoke exhaust components and sending the control instructions to the corresponding fans.
Preferably, a temperature sensor is also included; the temperature sensor is arranged at a heater of the catalytic device and used for measuring the temperature of the heater for heating the flue gas; the controller is electrically connected with the temperature sensor and the heater and is used for generating a control command according to the temperature of the heated flue gas and/or the smoke exhaust component and sending the control command to the heater and the fan.
Preferably, the water-spraying device also comprises a water-spraying spreader, wherein the water-spraying spreader is arranged inside the garbage mineralization furnace and is communicated with the bottoms of the water tanks of the water washing device through water pumps; the controller is electrically connected with the water pump and used for generating a control instruction and sending the control instruction to the corresponding water pump.
Preferably, the garbage mineralization furnace further comprises a humidity sensor, wherein the humidity sensor is arranged inside the garbage mineralization furnace; the controller is electrically connected with the humidity sensor and used for receiving the humidity measured by the humidity sensor and analyzing and generating a corresponding control instruction.
Preferably, dust device's screen cloth unit still includes the screen cloth bracket, each the monolithic screen cloth all is located on the screen cloth bracket, the flue lateral wall is seted up and is used for the dismouting the opening of screen cloth bracket.
Preferably, the single screen mesh is a trapezoidal plate made of metal materials, a plurality of screen holes for passing through smoke are formed in the top and the bottom of the trapezoidal plate, and the screen holes are uniformly arranged in an array manner; the screen unit comprises a plurality of single-sheet screens, the single-sheet screens are arranged on the screen bracket in a staggered and superposed mode, and the bottom of the single-sheet screen on the upper layer corresponds to the top of the single-sheet screen on the lower layer.
Preferably, the turn-back convolution unit comprises three or more turn-back plates, and two adjacent turn-back plates are positioned on different sides in the flue.
The above technical scheme of the utility model has following advantage: the utility model provides a flue gas processing system suitable for rubbish mineralizer, including flue and dust device, washing unit and catalytic unit, the flue gas that rubbish mineralization process produced passes through this flue gas processing system from bottom to top, and dust device filters the flue gas through the screen cloth unit of high temperature resistant metal preparation, filters tar and particulate matter, changes the flue gas flow path through the unit of circling round of turning back, and the flue gas circles round through turning back several times, and the particulate matter further falls under the action of gravity, does not continue to rise along with the flue gas; the water washing device carries out secondary water washing on the flue gas, and acidic substance gases such as sulfur dioxide, hydrogen sulfide and the like in the flue gas react with an alkaline reaction agent in the water tank to generate salt and water; catalytic device for converting CO, CH and NOxBy oxidation of harmful gases andconversion of original action to harmless CO2(carbon dioxide), H2O (water) and N2(Nitrogen). The flue gas treatment system can directly treat the flue gas with higher temperature, does not need to cool the flue gas, is easy to clean and maintain, can effectively purify the flue gas generated in the mineralization process, reduces pollutants to be discharged into the atmospheric environment, and is beneficial to reducing air pollutants.
Drawings
FIG. 1 is a front view of a flue gas treatment system suitable for a garbage mineralizer according to an embodiment of the present invention;
FIG. 2 is a side view of a flue gas treatment system suitable for a refuse mineralizer according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a dust settling device in an embodiment of the present invention;
FIG. 4 is a schematic view of a single-piece screen (partial) according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a plurality of the monolithic screens of FIG. 4 stacked in a staggered configuration;
FIG. 6 is a front view of a water washing apparatus according to an embodiment of the present invention;
FIG. 7 is a top view of the water washing apparatus according to the embodiment of the present invention;
FIG. 8 is a side view of a water washing apparatus according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a catalytic device according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view taken along line A-A of FIG. 9;
fig. 11 is a schematic diagram of the internal structure of the flue gas catalytic reactor in the embodiment of the present invention.
In the figure: 1: a furnace body; 21: a water tank; 22: a smoke inlet channel; 23: a smoke outlet channel; 24: connecting the flue; 25: a water level gauge; 26: a medicament addition port; 27: a water pump; 28: a nozzle;
31: a flue; 32: a single-piece screen; 321: screening holes; 33: a screen carrier; 331: a sealing part; 34: disassembling and assembling the handle; 35: a return plate; 36: a card slot; 37: a fan;
41: heating a tube; 42: a flue gas catalytic reactor; 43: a smoke detector;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 11, an embodiment of the present invention provides a flue gas treatment system suitable for a garbage mineralization furnace, as shown in fig. 1 and 2 (fig. 1 and 2 show their internal structures, and hide part of the flue), the system includes a flue 31, a dust settling device, a water washing device, and a catalytic device. Wherein, the flue 31 is discharged from bottom to top, that is, the flue 31 has its own smoke discharging direction from bottom to top. The flue 31 can be integrated or segmented and is arranged above the furnace body 1 of the garbage mineralization furnace.
The dust falling device is arranged inside the flue 31 and comprises a screen unit and a return convolution unit, wherein the screen unit comprises at least one single-piece screen 32 and can be made of high-temperature-resistant metal, such as stainless steel. The screen unit is arranged inside the flue 31 and used for filtering the flue gas discharged from the flue 31. The specific shape and size of the single screen 32 can be determined according to the shape and size of the flue 31, and the screen unit is preferably arranged at the bottom end of the flue 31.
The back-turning convolution unit is arranged above the screen unit, and the flue gas passing through the screen unit enters the back-turning convolution unit. The turning-back convolution unit comprises at least two turning-back plates 35, as shown in fig. 3, one turning-back plate 35 is arranged on one side inside the flue 31, the other turning-back plate 35 is arranged on the other opposite side inside the flue 31, and the turning-back plates 35 are arranged at intervals along the smoke outlet direction of the flue 31 and are inclined towards the smoke outlet direction of the flue 31. It should be noted that, after the turning back and turning back unit is added, the flow path of the smoke in the flue 31 is changed, but the smoke outlet direction of the flue here refers to the original smoke outlet direction of the flue. Preferably, as shown in fig. 3, one end of each of the folding plates 35 is disposed on the side wall of the flue 31, and the other end extends into the flue 31, exceeds the center line of the flue 31, and does not contact with the inner wall on the opposite side, and the folding plates 35 divide the inner space of the flue 31 to form an S-shaped flue gas flow path. The specific shape and size of the folding back plate 35 can also be designed according to the flue duct 31.
As shown in fig. 1, the water washing device is provided outside the flue duct 31 and communicates with the flue duct 31. As shown in fig. 6 to 8, the water washing apparatus includes two water tanks 21 filled with alkaline reaction agent, wherein the alkaline reaction agent is prepared by dissolving alkaline substance in water, and the alkaline substance is preferably hydrated lime. Both water tanks 21 are made of a corrosion-resistant material, preferably stainless steel. The specific dimensions of the water tank 21 can be set according to the flue gas flow to be treated and are not further limited herein.
Every water tank 21 all is equipped with the cigarette passageway 22 of advancing and goes out cigarette passageway 23 that the interval set up, as shown in fig. 8, advances cigarette passageway 22 one end port and locates this water tank 21 outsidely, and another end port stretches into below this water tank 21 inside alkaline reaction medicament liquid level, goes out cigarette passageway 23 one end port and locates above this water tank 21 inside alkaline reaction medicament liquid level, and another end port locates this water tank 21 outsidely. As shown in fig. 7, the port of the smoke outlet passage 23 of one water tank 21 communicates with the port of the smoke inlet passage 22 of the other water tank 21 through the connecting flue 24. The port of the smoke inlet passage 22 and the port of the smoke outlet passage 23 which are not communicated with the connecting flue 24 are respectively communicated with the dust fall device and the catalytic device. Establish dust device, the one end of washing device and catalytic unit inflow flue gas is for advancing the cigarette end, the one end of outflow is for going out the cigarette end, as shown in figure 1, the cigarette end that advances that is washing device with the 22 ports of the cigarette passageway that advances that connects 24 intercommunications of flue, with the play cigarette end intercommunication of dust device, the play cigarette end intercommunication of cigarette passageway 23 ports that do not communicate with connection 24 of flue is for the washing device goes out the cigarette end, with catalytic unit's the end intercommunication that advances, the flue gas through dust device lets in the washing device, the rethread catalytic unit.
As shown in fig. 1 and 2, the catalytic device is arranged inside the flue 31, preferably at the top end of the flue 31, and as shown in fig. 9 to 11, the catalytic device comprises a heater and at least three flue gasesA catalytic reactor 42. Wherein, the heater is located dust device top, and specifically, the heater can adopt a plurality of heating pipes 41, and heating pipe 41 stretches into in the flue 31, and the flue gas is heated in order to reach the required temperature of catalysis before being used for the flue gas to get into flue gas catalytic reactor 42. As shown in fig. 11, the inside of the flue gas catalytic reactor 42 is a porous honeycomb structure, and is attached with a catalyst, and the catalyst can be made of platinum, rhodium, palladium, and is sprayed on the porous honeycomb structure. At least three flue gas catalytic reactors 42 are circumferentially and uniformly disposed above the heater. The flue gas heated by the heater enters the flue gas catalytic reactor 42, and the catalyst in the flue gas catalytic reactor 42 enhances CO, CH and NOxThe activity of the three gases promotes the oxidation-reduction chemical reaction, wherein CO is oxidized into colorless and nontoxic CO at high temperature2A gas; oxidation of CH compounds to H at high temperatures2O and CO2；NOxReduction to N2And O2Three harmful gases become harmless gases, so that tail gas can be purified.
The utility model provides a flue gas processing system suitable for rubbish mineralizer can be used to the hot flue gas that purification treatment rubbish mineralization process produced. This system adopts particulate matter and tar in the high temperature resistant screen cloth unit filtration flue gas, and the flue gas after the filtration is through the unit that circles round of turning back, and the flow that circles round of turning back prolongs the dwell time of flue gas, and at this in-process, because the action of gravity, particulate matter in the flue gas continues to fall back, does not discharge along with the flue gas, can effectively restrain the emission of particulate matter, reaches the purpose of flue gas dust fall. The single screen 32 in the screen unit can directly treat high-temperature flue gas without a cooling process, is not easy to adhere and block, can be taken out after being used for a period of time, and can be cleaned by soaking and scrubbing with alkaline solution for repeated use.
The flue gas after dust suppression processing by the dust suppression device is introduced into the water washing device, after the flue gas enters one water tank 21, acidic substance gases such as sulfur dioxide and hydrogen sulfide in the flue gas react with an alkaline reaction agent in the water tank 21 to generate salt and water, the residual gas is input into the other water tank 21 through the connecting flue 24, the residual gas reacts with the alkaline reaction agent in the water tank 21 again to carry out secondary water washing, sulfur-containing components are obviously reduced, and the emission of sulfides is effectively controlled. Meanwhile, fine particles in the flue gas can absorb water and precipitate through the water tank 21 and remain in the alkaline reaction agent solution, and the tar can be changed into a liquid state through the water tank 21 after the temperature of the tar is reduced and can also remain in the water tank 21 and cannot be continuously discharged along with the flue gas, so that the aim of reducing harmful substances in the flue gas is fulfilled. And the washing device has no problems of easy scaling, blockage and the like, and the alkaline reaction agent after washing is easy to take out and convenient to maintain.
The flue gas after the secondary washing treatment of the washing device is introduced into the catalytic device, the flue gas introduced into the catalytic device is heated by the heater and then is subjected to catalytic treatment by the flue gas catalytic reactor, so that harmful substances in the tail gas are further converted, the air pollution caused by smoke discharge in the process of mineralizing the garbage is reduced, and the environmental protection is facilitated.
In some preferred embodiments, as shown in fig. 1 and 2, the flue gas treatment system further comprises at least two fans 37, the dust-settling device is communicated with the water washing device through at least one fan 37, and the fans 37 assist the flue gas to flow from the dust-settling device to the water washing device. The water washing device is communicated with the catalytic device through at least one fan 37, and the fan 37 assists the flue gas to flow into the catalytic device from the water washing device. Preferably, the fan 37 is communicated with the dust falling device, the water washing device and the catalytic device through an auxiliary smoke pipe. As shown in fig. 1, when two fans 37 are provided, one end of one fan 37 is connected to the smoke outlet of the dust falling device through the auxiliary smoke tube, and the other end is connected to the smoke inlet of the water washing device through the auxiliary smoke tube. One end of the other fan 37 is communicated with the smoke outlet end of the water washing device through an auxiliary smoke pipe, and the other end of the other fan is connected to the smoke inlet end of the catalytic device through the auxiliary smoke pipe.
Preferably, the flue gas treatment system further comprises a controller and a flue gas detector 43. As shown in fig. 2, the smoke detector 43 is disposed at an outlet above the flue 31 and is used for detecting smoke components, and the controller is electrically connected to the smoke detector 43 and each of the fans 37 and is used for generating a control command according to the smoke components detected by the smoke detector 43 and sending the control command to the corresponding fan 37 to control the operating state of the fan 37. For example, when the smoke detector 43 detects that the smoke components contain harmful gases which are not treated completely, the power of the fan 37 can be reduced, the retention time in the smoke flue 31 can be prolonged, and the effect of purifying the smoke can be improved.
As shown in fig. 1, a chimney cap is preferably disposed at the outlet above the flue 31, and the chimney cap can shield the outlet above the flue 31 to prevent impurities from falling into the outlet, and protect the smoke detector 43 disposed at the outlet above the flue 31.
Further preferably, the flue gas treatment system further comprises a temperature sensor. The temperature sensor is arranged at the heater of the catalytic device and used for measuring the temperature of the heater for heating the flue gas. The controller is electrically connected with the temperature sensor and the heater and is used for generating a control command according to the temperature of the heated flue gas and/or the smoke exhaust components, sending the control command to the heater and/or the corresponding fan 37 and controlling the working states of the heater and the fan 37. For example, when a temperature is detected to be too low, the heater power may be increased or the fan 37 power may be decreased, and when a temperature is detected to be too high, the heater power may be decreased or the fan 37 power may be increased. When the smoke detector 43 detects that the smoke components contain harmful gases which are not processed completely, the power of the heater can be increased, and the power of the fan 37 is reduced. The temperature and the smoke discharging components of the flue gas are comprehensively heated, so that the energy conservation and emission reduction can be realized while the flue gas treatment effect is ensured. When the heater adopts a plurality of heating pipes 41, the power can be increased by opening more heating pipes 41, and the power can be reduced by closing part of the heating pipes 41.
In some preferred embodiments, the flue gas treatment system further comprises a water mist diffuser, as shown in fig. 1 and 2, which is arranged inside the waste mineralization furnace and is communicated with the bottom of each water tank 21 of the water washing device through a water pump 27. The controller is electrically connected with each water pump 27 and is used for generating a control instruction and sending the control instruction to the corresponding water pump 27 so as to control the working state of the water pump 27. The water pump 27 can convey the alkaline reaction agent in the water tank 21 to the water mist spreader, and the alkaline reaction agent is sprayed to the interior of the furnace body 1 of the garbage mineralization furnace by the water mist spreader, so that the agent after reaction in the water tank 21 and the deposit generated by the reaction can be timely pumped out, the deposition of particles, tar and other substances in the flue gas in the water tank 21 can be avoided, and the water tank 21 is cleaned without extra labor.
Preferably, this flue gas processing system still includes humidity transducer, and humidity transducer locates inside rubbish mineralize furnace body 1 for detect the inside humidity of rubbish mineralize furnace. The controller is electrically connected with the humidity sensor and used for receiving the humidity inside the furnace body 1 measured by the humidity sensor, analyzing and generating corresponding control instructions and sending the control instructions to the water pumps 27, so that the spraying condition of the water mist spreader is controlled, the humidity inside the garbage mineralization furnace is increased by using the liquid medicament in the water tank 21, the humidity inside the furnace is kept in a proper working range, and the temperature of mineralization reaction inside the furnace body 1 can be reduced to a certain degree.
Further preferably, the flue gas treatment system further comprises an open fire detector, wherein the open fire detector is arranged inside the garbage mineralization furnace and electrically connected with the controller, and is used for detecting whether an open fire point exists inside the furnace body 1 and feeding back information to the controller. The controller is used for receiving the information of the open fire points in the garbage mineralization furnace fed back by the open fire detector, analyzing and generating corresponding control instructions, sending the control instructions to the water pumps 27, and controlling the water pumps to work so as to spray liquid into the furnace in time when the open fire points appear in the furnace. The open fire detector may be an infrared detector. In the mineralization process, the contents in the garbage mineralization furnace can be divided into a garbage layer, a mineralization layer and an ashing layer from top to bottom, the garbage layer is mineralized by the mineralization layer, the garbage layer sinks along with the mineralization continuous process to form a new mineralization layer, and the heat of the original mineralization layer is exhausted along with the time and is converted into the ashing layer. Because the temperature is higher when the rubbish layer changes to the mineralized layer, local temperature exceeding limit is easy to occur, open fire points are caused, and the detection position of the open fire detector is preferably arranged near the junction of the rubbish layer and the mineralized layer.
Preferably, the water mist dispenser comprises a plurality of nozzles 28, each nozzle 28 being separately located at a different position above the interior of the furnace body 1 of the refuse mineralization furnace, and being operable and closable independently and synchronously to spray liquid to different regions of the refuse mineralization furnace.
Further preferably, each nozzle 28 is rotatably disposed inside the furnace body 1 of the refuse mineralization furnace through a rotating device, the controller is electrically connected with each rotating device, and is used for analyzing and generating a corresponding rotating instruction according to the temperature fed back by the temperature sensing device and/or the open fire information fed back by the open fire detector, and sending the corresponding rotating instruction to the corresponding rotating device, each rotating device can rotate independently or synchronously, the controller controls the corresponding rotating device to drive the nozzle 28 to rotate according to the detected information, and sprays towards the vicinity of the open fire in the furnace aiming at the open fire, for example, sprays towards the upper part of the open fire in the refuse layer, so that liquid permeates into the open fire, the mineralization process is controlled to be free of the open fire, and harmful substances are reduced.
Considering that the liquid level of the alkaline reaction chemical in the water tank 21 directly affects the effect of the washing flue gas, the liquid level is too high and may cause overflow, and too low may cause the washing effect to drop or even fail, preferably, as shown in fig. 6, a water level meter 25 is arranged on the side wall of each water tank 21, the water level meter 25 is communicated with the inside of the water tank 21, and is used for monitoring the liquid level of the alkaline reaction chemical in the water tank 21 in real time, and further preferably, a warning liquid level is further arranged on the water level meter 25 and is used for reminding a user to add the alkaline reaction chemical into the water tank 21 in time.
Preferably, a chemical adding port 26 is opened above each water tank 21 for adding an alkaline reaction chemical into the water tank 21. In a preferred embodiment, the washing device further comprises a chemical adding device, the chemical adding device is disposed at the chemical adding port 26 of the water tank 21, the controller is electrically connected to the water level meters 25 and the chemical adding ports 26 of the two water tanks 21, and is used for judging whether to open the corresponding chemical adding port 26 according to the information whether the liquid level of the alkaline reaction chemical monitored by each water level meter 25 reaches the warning liquid level, generating a corresponding injection control command, sending the command to each chemical adding port 26, controlling the corresponding chemical adding port 26 to open and close, and injecting the alkaline reaction chemical into the water tank 21 through the chemical adding device.
In order to ensure that the flue gas introduced from the flue gas inlet channel 22 can fully react with the alkaline reaction agent in the water tank 21, preferably, the difference between the height of the port of the flue gas inlet channel 22 of each water tank 21 extending into the water tank 21 and the height of the liquid level of the alkaline reaction agent in the water tank 21 is 1/3-2/3, and the difference between the height of the port of the flue gas inlet channel 22 extending into the water tank 21 and the height of the port of the adjacent flue gas outlet channel 23 arranged in the water tank 21 is 1/3-2/3 of the height of the water tank 21. The distance separating the smoke outlet passage 23 and the smoke inlet passage 22 is preferably not less than 1/2 of the length of the water tank 21.
Preferably, the smoke inlet channel 22 and the smoke outlet channel 23 both open vertically into the water tank 21, avoiding liquid remaining at the ports. The part of the smoke inlet channel 22 of each water tank 21 extending into the water tank 21 is preferably in a trumpet shape with an upper caliber smaller than a lower caliber, and a port extending below the liquid level is preferably provided with a large-hole screen mesh so as to crush bubbles and enable the introduced smoke to be fully contacted with the alkaline reaction agent for reaction.
In a preferred embodiment, a filter screen, preferably a small-hole steel wire mesh, is disposed at one end port of the smoke outlet channel 23 of each water tank 21 inside the water tank 21, and is configured to filter particulate matters in smoke, and to help condense water vapor, reduce humidity of output smoke, and help prevent alkaline reaction agent from overflowing at the end port of the smoke outlet channel 23 due to gas flow. Preferably, the strainer is inclined to facilitate the flow of filtered impurities and moisture back into the tank 21.
Preferably, as shown in fig. 3 to 5, the screen unit of the dust falling device further includes a screen bracket 33, and each of the single-piece screens 32 is provided on the screen bracket 33. The single-piece screen 32 may be detachably fixed to the screen bracket 33 by a bayonet structure or by a bolt tight connection. Correspondingly, the side wall of the flue duct 31 is provided with an opening for mounting and dismounting the screen bracket 33, as shown in fig. 3, the screen bracket 33 can be inserted through the opening on the side wall of the flue duct 31, namely, each single screen 32 can be mounted inside the flue duct 31 through the screen bracket 33. The screen unit can be integrally installed or removed for cleaning by the screen bracket 33, and maintenance is more convenient.
The utility model discloses single piece screen cloth 32 among the dust device can adopt the wire net. Preferably, the single screen 32 is a trapezoidal plate made of a metal material, as shown in fig. 4, the single screen 32 is provided with a plurality of rows of grooves arranged in parallel at intervals, the cross section of the single screen 32 is a trapezoid arranged in series, the top and the bottom of the trapezoidal plate are both provided with a plurality of sieve holes 321 for passing through the flue gas, that is, the sieve holes 321 are arranged at the bottom of each groove and the connection between two adjacent grooves, and each sieve hole 321 is arranged in an array manner. When the flue gas passes through sieve mesh 321, the large granule in the flue gas is separated by sieve mesh 321, falls back under the action of gravity, and the tar in the flue gas is adsorbed in the slot of trapezoidal plate under electrostatic adsorption's effect, does not discharge along with the flue gas, realizes filtering particulate matter and tar in the flue gas. The specific number and size of the holes 321 and grooves can be adjusted according to the smoke evacuation condition, and are not further limited herein.
Considering that the filtering effect of one single screen 32 on the flue gas is limited, the filtering effect of the screen unit can be improved by increasing the number of the single screens 32 in the screen unit. Preferably, the screen unit includes a plurality of single-piece screens 32, the plurality of single-piece screens 32 are alternately stacked on the screen bracket 33, as shown in fig. 5, in two adjacent single-piece screens 32, the bottom of the upper single-piece screen 32 corresponds to the top of the lower single-piece screen 32, but the bottom of the upper single-piece screen 32 corresponds to the bottom of the lower single-piece screen 32, and the single-piece screens 32 may contact or be spaced apart from each other. A plurality of monolithic screen cloth 32 can filter the flue gas many times, and crisscross stack can avoid filtering the tar that remains and particulate matter blocks up sieve mesh 321, influences the filter effect.
Preferably, as shown in fig. 3, a sealing portion 331 matching with an opening opened in a side wall of the flue 31 is provided at an end of one side of the screen bracket 33, and by the cooperation of the sealing portion 331 and the opening, the flue gas can be prevented from leaking from the opening, and the untreated flue gas can be prevented from leaking to the atmosphere. It is preferable that the attachment/detachment handle 34 is provided outside the sealing portion 331, and the screen bracket 33 and the single screen 32 can be more easily attached/detached by attaching/detaching the handle 34.
Further preferably, an asbestos net is arranged between the sealing portion 331 and the opening of the side wall of the flue 31, and the asbestos net is clamped and fixed at the interface of the flue 31 and the sealing portion 331, so that the smoke leakage phenomenon can be further prevented.
The number, the size and the shape of the turning-back plates 35 in the turning-back convolution unit can be determined by the specific conditions of the flue 31, namely the smoke exhaust requirement, the more the turning-back plates 35 are, the more the times of smoke returning and convolution are, and/or the larger the shielding range of the turning-back plates 35 is, the longer the smoke dust settling time is, and the better the pollutant reduction effect is.
In a preferred embodiment, the folding back convolution unit includes three or more folding back plates 35, and two adjacent folding back plates 35 are located at different sides in the flue duct 31, that is, two adjacent folding back plates 35 are not located at the same side. Preferably, the respective folding plates 35 are alternately disposed on opposite sides inside the flue duct 31, that is, two adjacent folding plates 35 are disposed on opposite sides, or each folding plate 35 is disposed inside the flue duct 31 along a spiral line.
Further preferably, when the respective folded plates 35 are alternately arranged, the length of the overlapping area of two adjacent folded plates 35 is not less than 1/3 of its own length. When each of the folded plates 35 is arranged along a spiral line, the width of the overlapping area of two adjacent folded plates 35 is not less than 1/3 of the width of the overlapping area. The overlapping region here refers to a region where the folding-back plate 35 overlaps when projected in the smoke discharge direction.
Preferably, the inclination angle of the turning plate 35 relative to the smoke outlet direction of the flue 31 is 30-70 degrees, the smaller the inclination angle of the turning plate 35 relative to the smoke outlet direction of the flue 31 is, the longer the time for the smoke to turn back and flow through the turning back and turning back unit is, the better the dust fall effect is, but the larger the inclination angle is, the particles can fall back to the lower part of the turning back and turning back unit, and the adhesion of the particles and tar to the turning back plate 35 is reduced.
In order to conveniently arrange the turning-back plate 35, preferably, as shown in fig. 3, the turning-back plate 35 is detachably arranged inside the flue 31 through a clamping groove 36, the clamping groove 36 is arranged on the side wall of the flue 31, the notch of the clamping groove 36 inclines towards the smoke outlet direction of the flue 31, when in use, one side of the turning-back plate 35 is inserted into the notch of the clamping groove 36, and then the turning-back plate 35 can be arranged inside the flue 31.
In some preferred embodiments, the dust settling device of the flue gas treatment system is also provided with heating pipes 41, as shown in fig. 3, each heating pipe 41 is provided in the turn-back convolution unit, the heating pipe 41 is provided between two turn-back plates 35, and further preferably, 1-3 parallel heating pipes 41 are provided between every two adjacent turn-back plates 35. The heating pipe 41 in the dust falling device extends into the flue 31, is preferably vertical to the smoke outlet direction of the flue 31, and secondarily heats the insufficiently combusted substances in the smoke to ensure that the insufficiently combusted substances are fully combusted, so that the emission of particulate matters is further reduced. The turning-back convolution unit can prolong the retention time of the flue gas, and the secondary heating can be ensured to be fully carried out in the turning-back convolution process.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a flue gas processing system suitable for rubbish mineralize furnace which characterized in that: comprises a flue, a dust falling device, a water washing device and a catalytic device;
the flue discharges smoke from bottom to top;
the dust settling device is arranged in the flue and comprises a screen unit and a turn-back convolution unit; the screen unit comprises at least one single-sheet screen used for filtering the smoke; the turning-back convolution unit is arranged above the screen unit and comprises at least two turning-back plates, one turning-back plate is arranged on one side in the flue, the other turning-back plate is arranged on the opposite side in the flue, and the turning-back plates are arranged at intervals along the flue smoke outlet direction and are inclined towards the flue smoke outlet direction;
the water washing device is arranged outside the flue and comprises two water tanks filled with alkaline reaction agents; each water tank is provided with a smoke inlet channel and a smoke outlet channel which are arranged at intervals, one end port of each smoke inlet channel is arranged outside the water tank, the other end port of each smoke inlet channel extends into the position below the liquid level of the alkaline reaction agent in the water tank, one end port of each smoke outlet channel is arranged above the liquid level of the alkaline reaction agent in the water tank, and the other end port of each smoke outlet channel is arranged outside the water tank; the smoke outlet channel port of one water tank is communicated with the smoke inlet channel port of the other water tank through a connecting flue; the smoke inlet channel port and the smoke outlet channel port which are not communicated with the connecting flue are respectively communicated with the dust falling device and the catalytic device;
the catalytic device is arranged in the flue and comprises a heater and at least three flue gas catalytic reactors; the heater is arranged below the flue gas catalytic reactor and used for heating the flue gas entering the flue gas catalytic reactor; the inside of the flue gas catalytic reactor is of a porous honeycomb structure and is attached with a catalyst.
2. The flue gas treatment system of claim 1, wherein: still include two at least fans, dust device with water washing device passes through at least one the fan intercommunication, water washing device with catalytic unit passes through at least one the fan intercommunication.
3. The flue gas treatment system of claim 2, wherein: the fan is communicated with the dust falling device, the water washing device and the catalyzing device through an auxiliary smoke tube.
4. The flue gas treatment system of claim 2, wherein: the device also comprises a controller and a smoke detector; the smoke detector is arranged at an outlet at the top end of the flue and used for detecting smoke exhaust components, and the controller is electrically connected with the smoke detector and the fans and used for generating control instructions according to the smoke exhaust components and sending the control instructions to the corresponding fans.
5. The flue gas treatment system of claim 4, wherein: the device also comprises a temperature sensor; the temperature sensor is arranged at a heater of the catalytic device and used for measuring the temperature of the heater for heating the flue gas; the controller is electrically connected with the temperature sensor and the heater and is used for generating a control command according to the temperature of the heated flue gas and/or the smoke exhaust component and sending the control command to the heater and the fan.
6. The flue gas treatment system of claim 4, wherein: the water tank is communicated with the bottom of each water tank of the water washing device through a water pump; the controller is electrically connected with the water pump and used for generating a control instruction and sending the control instruction to the corresponding water pump.
7. The flue gas treatment system of claim 6, wherein: the garbage mineralization furnace is characterized by also comprising a humidity sensor, wherein the humidity sensor is arranged inside the garbage mineralization furnace; the controller is electrically connected with the humidity sensor and used for receiving the humidity measured by the humidity sensor and analyzing and generating a corresponding control instruction.
8. The flue gas treatment system of claim 1, wherein: the screen cloth unit of dust device still includes the screen cloth bracket, each the monolithic screen cloth is all located on the screen cloth bracket, the flue lateral wall is seted up and is used for the dismouting the opening of screen cloth bracket.
9. The flue gas treatment system of claim 8, wherein: the single screen mesh is a trapezoidal plate made of metal materials, a plurality of sieve pores for smoke to pass through are arranged at the top and the bottom of the trapezoidal plate, and the sieve pores are uniformly arranged in an array manner; the screen unit comprises a plurality of single-sheet screens, the single-sheet screens are arranged on the screen bracket in a staggered and superposed mode, and the bottom of the single-sheet screen on the upper layer corresponds to the top of the single-sheet screen on the lower layer.
10. The flue gas treatment system of claim 8, wherein: the turn-back convolution unit comprises three or more turn-back plates, and two adjacent turn-back plates are positioned on different sides in the flue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920454317.0U CN210021575U (en) | 2019-04-04 | 2019-04-04 | Flue gas treatment system suitable for garbage mineralization furnace |
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| CN201920454317.0U CN210021575U (en) | 2019-04-04 | 2019-04-04 | Flue gas treatment system suitable for garbage mineralization furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109806709A (en) * | 2019-04-04 | 2019-05-28 | 哈尔滨工大环能科技有限公司 | A kind of smoke processing system suitable for rubbish mineralising furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109806709A (en) * | 2019-04-04 | 2019-05-28 | 哈尔滨工大环能科技有限公司 | A kind of smoke processing system suitable for rubbish mineralising furnace |
| CN109806709B (en) * | 2019-04-04 | 2024-05-31 | 哈尔滨工大环能科技有限公司 | Flue gas treatment system suitable for garbage mineralization furnace |
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Effective date of registration: 20230516 Address after: Room 102, Building 3, No. 54 Qingchun Road, Huairou District, Beijing, 101499 Patentee after: Beijing Hagong Environmental Science and Technology Co.,Ltd. Patentee after: HARBIN TECHNICAL UNIVERSITY IN SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: Room 808, building 9 (No. 1616, Chuangxin Road), coastal creative science and technology port and Internet of things technology R & D center, Harbin hi tech Industrial Development Zone, Heilongjiang Province Patentee before: HARBIN GONGDA HUANNENG TECHNOLOGY Co.,Ltd. Patentee before: HARBIN TECHNICAL UNIVERSITY IN SCIENCE AND TECHNOLOGY Co.,Ltd. |