CN216386967U - Dioxin monitoring system suitable for high dust environment - Google Patents
Dioxin monitoring system suitable for high dust environment Download PDFInfo
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- CN216386967U CN216386967U CN202122870166.7U CN202122870166U CN216386967U CN 216386967 U CN216386967 U CN 216386967U CN 202122870166 U CN202122870166 U CN 202122870166U CN 216386967 U CN216386967 U CN 216386967U
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Abstract
The utility model relates to the technical field of environment-friendly monitoring equipment, in particular to a dioxin monitoring system suitable for a high-dust environment, which comprises a reaction tower, a front-end sampling device, a rear-end sampling device and a flue gas monitoring chamber, wherein the reaction tower is connected with the front-end sampling device; the outlet end of the reaction tower is communicated with a first sampling pipeline which is connected with the inlet end of a rear-end sampling device, and the outlet end of the rear-end sampling device is connected with a flue gas monitoring chamber through a first connecting pipeline; the first sampling pipeline is provided with a second sampling pipeline, the second sampling pipeline is connected with the inlet end of the front-end sampling device, and the outlet end of the front-end sampling device is connected with monitoring equipment of the smoke monitoring chamber through a second connecting pipeline; the monitoring equipment is used for analyzing and comparing the collected smoke in the front-end sampling device and the rear-end sampling device. The utility model can continuously and automatically sample and compare at different positions of the output pipeline of the reaction tower, and realizes the rapid detection of components such as dioxin, so that the real emission condition of the dioxin in the emission source can be known in detail.
Description
Technical Field
The utility model relates to the technical field of environment-friendly monitoring equipment, in particular to a dioxin monitoring system suitable for a high-dust environment.
Background
At present, garbage incineration treatment plants which are operated in China reach more than 400 seats, the generation and emission of flue gas dioxin become the biggest restriction factors for popularizing the household garbage incineration treatment technology, and the incineration treatment technology can be rapidly popularized and applied only by comprehensively detecting and effectively controlling the emission of the dioxin. China has issued and implemented dioxin emission standards for incinerators, and carries out dioxin emission detection on incinerator flue gas, but the frequency is only 1 time/year, the real emission situation of dioxin in an emission source cannot be known in detail, and emission reduction is difficult to implement effectively. The method develops an on-line monitoring technology of dioxin pollution, realizes the rapid detection of dioxin concentration, guides optimization control measures, and is beneficial to promoting the emission reduction work of domestic garbage incineration and flue gas dioxin treatment of enterprises.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dioxin monitoring system suitable for a high-dust environment, which can continuously and automatically sample and compare different positions of an output pipeline of a reaction tower, and realize the rapid detection of components such as dioxin, so that the real emission condition of the dioxin in an emission source can be known in detail.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a dioxin monitoring system suitable for a high-dust environment comprises a reaction tower, a front end sampling device, a rear end sampling device, a flue gas monitoring chamber and a scraper conveyor;
the reaction tower is internally provided with a reaction cavity, the reaction cavity is used for storing flue gas and deacidifying the flue gas, the outlet end of the reaction cavity is connected with one end of a first sampling pipeline, the other end of the first sampling pipeline is connected with the inlet end of a rear-end sampling device, the inlet end of the rear-end sampling device is provided with an active carbon injection device, the active carbon injection device is used for adsorbing the flue gas, the outlet end of the rear-end sampling device is connected with the flue gas monitoring chamber through a first connecting pipeline, and the middle part of the pipeline of the first connecting pipeline is provided with an induced draft fan;
the first sampling pipeline is provided with a second sampling pipeline, the second sampling pipeline is a branch pipeline in the middle of a pipeline section of the first sampling pipeline, the second sampling pipeline is connected with the inlet end of the front-end sampling device, the front-end sampling device is used for filtering flue gas which is not thoroughly deacidified and performing dust removal treatment on the flue gas, and the outlet end of the front-end sampling device is connected with monitoring equipment of the flue gas monitoring room through a second connecting pipeline;
the smoke monitoring chamber is internally provided with a vacuum sampling pump and monitoring equipment, the vacuum sampling pump provides extraction power for the front-end sampling device, and the monitoring equipment is used for analyzing and comparing the collected smoke in the front-end sampling device and the collected smoke in the rear-end sampling device;
the scraper machine is respectively arranged at the lower ends of the reaction tower, the front end sampling device and the rear end sampling device, and is used for collecting dust discharged by the reaction tower, the front end sampling device and the rear end sampling device and transporting the dust to a specified place.
Preferably, the front-end sampling device comprises a square box body and an overhauling platform, and the square box body is erected at the upper end of the scraper conveyor through the overhauling platform;
a partition board is arranged in the square box body, the square box body is divided into a smoke cleaning chamber located on the upper layer and a dust removing chamber located on the lower layer by the partition board, a mounting hole is formed in the partition board and is communicated with the smoke cleaning chamber and the dust removing chamber, a polytetrafluoroethylene filter bag is detachably hung in the mounting hole and is used for filtering smoke which is not thoroughly deacidified and removing dust of the smoke;
the smoke purifying chamber is connected with the second connecting pipeline, a first pneumatic butterfly valve and a sampling probe are arranged on the second connecting pipeline, and the first pneumatic butterfly valve is used for controlling the second connecting pipeline to be opened and closed;
the dust removal chamber is connected with the second sampling pipeline, a second pneumatic butterfly valve is arranged on the second sampling pipeline, and the second pneumatic butterfly valve is used for controlling the opening and closing of the second sampling pipeline;
the bottom of clean room is equipped with the observation window, just the bottom of clean room has connected gradually toper ash bucket and lower ash pipe, the toper ash bucket is connected through unloading the grey valve ash pipe down, be equipped with the observation hole on the body of ash pipe down, the lower ash mouth of ash pipe is located down scrape the upper end of trigger.
Preferably, a drain pipe is further arranged on the second sampling pipe, the drain pipe is a branch of the second sampling pipe, and a drain valve is arranged on the drain pipe and used for controlling a switch of the drain pipe.
Preferably, the pipe diameter of the second sampling pipeline is gradually reduced from the outlet end of the reaction tower to the inlet end of the front-end sampling device.
Preferably, the second connecting pipeline is a heat tracing pipeline, and the heating temperature of the heat tracing pipeline is 100-200 ℃.
Preferably, a cleaning device is further arranged in the smoke purifying chamber, and the cleaning device comprises a spray pipe and a nozzle;
the spray pipe penetrates through the square box body, the spray nozzle is communicated with the spray pipe, and the spray nozzle is positioned right above the polytetrafluoroethylene filter bag;
the input end of the spray pipe is connected with a compressed air device, and a pressure reducing valve, a pressure gauge and a cleaning electromagnetic valve are sequentially connected in a connecting pipe section of the spray pipe and the compressed air device.
Preferably, the interior of the rear-end sampling device is divided into a plurality of compartments, the plurality of compartments are connected with the first sampling pipeline and the first connecting pipeline together, an inlet end of the rear-end sampling device is provided with an inlet valve, an outlet end of the rear-end sampling device is provided with an outlet valve, a plurality of filter bags are vertically suspended in any one of the compartments, a universal ash bucket is installed between adjacent compartments, and the adjacent compartments are distributed at intervals from front to back;
the universal ash bucket is provided with a vibrator, an electric heat tracing device and a material level meter.
Preferably, the tops of the compartments are provided with corresponding cylinder lift valves, electromagnetic valves and injection pipes, one end of each injection pipe is connected with the compressed air device, the other end of each injection pipe is arranged right above the corresponding filter bag, the cylinder lift valves are used for controlling the on-off of the compressed air devices, and the electromagnetic valves are used for controlling the on-off of the injection pipes.
Preferably, an upper splitter plate and a lower splitter plate are arranged between the adjacent compartments, and a splitter groove is formed between the upper splitter plate and the lower splitter plate;
one end of the upper splitter plate is connected with the upper end of the inlet end of the rear-end sampling device, the other end of the upper splitter plate is connected with the lower end of the outlet end of the rear-end sampling device, and the upper splitter plate is obliquely and downwards arranged from right to left;
one end of the lower splitter plate is connected with the lower end of the inlet end of the rear-end sampling device, the other end of the lower splitter plate is connected with the lower end of the outlet end of the rear-end sampling device, the lower splitter plate is horizontally arranged, symmetrical splitter box connectors are arranged at the lower end of the lower splitter plate, and the splitter box connectors are respectively communicated with the adjacent compartments.
Preferably, the angle of inclination of the upper splitter plate is 10 ° to 20 °.
Compared with the prior art, the technical scheme has the following beneficial effects: according to the utility model, the front-end sampling device is adopted to filter out high-concentration dust in the sampled smoke, the rear-end sampling device is used to remove acid gas and dioxin in the smoke, the collected front-end smoke and rear-end smoke are subjected to component analysis and comparison through monitoring equipment, the influence of active carbon on dioxin components is eliminated, the subsequent dioxin component analysis is facilitated, and the analysis accuracy is increased.
Drawings
Fig. 1 is a schematic structural diagram of a dioxin monitoring system suitable for a high dust environment according to the present invention;
FIG. 2 is a schematic top view of a dioxin monitoring system of the present invention suitable for use in high dust environments;
FIG. 3 is a schematic diagram of a dioxin monitoring system of the present invention that is suitable for use in high dust environments;
fig. 4 is a schematic structural diagram of a front-end sampling device of a dioxin monitoring system suitable for a high-dust environment according to the utility model;
FIG. 5 is an enlarged view of a portion of area A of FIG. 1;
FIG. 6 is a schematic cross-sectional view of a diverter tank of a dioxin monitoring system suitable for use in high-dust environments in accordance with the present invention;
in the drawings: the device comprises a reaction tower 1, a front end sampling device 2, a rear end sampling device 3, a flue gas monitoring chamber 4, a first sampling pipeline 5, a first connecting pipeline 6, a second sampling pipeline 7, a second connecting pipeline 8, a cleaning device 9, a scraper conveyor 10, a square box body 20, an overhaul platform 21, a partition plate 22, a mounting hole 23, a polytetrafluoroethylene filter bag 24, an observation window 25, a conical ash hopper 26, a lower ash pipe 27, an ash discharge valve 28, an observation hole 29, a compartment 30, an air inlet valve 31, an air outlet valve 32, a general ash hopper 33, an air cylinder lift valve 34, an electromagnetic valve 35, an injection pipe 36, an upper splitter plate 37, a lower splitter plate 38, a splitter box 39, a second pneumatic butterfly valve 71, a drain pipeline 72, a drain valve 73, a first pneumatic butterfly valve 81, a sampling probe 82, a spray pipe 91, a nozzle 92, a pressure reducing valve 93, a pressure gauge 94, a cleaning electromagnetic valve 95, an induced draft fan 60, an inlet end of the rear end sampling device 301, a first sampling pipeline, a second sampling pipeline 5, a second sampling pipeline 8, a second sampling device 3, a second sampling device 3, a second device, a fourth sampling device 3, a fourth sampling device, a fourth, The outlet end 302 of the rear end sampling device, the splitter box interface 391 and the inclination angle alpha.
Detailed Description
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 6, a dioxin monitoring system suitable for a high-dust environment comprises a reaction tower 1, a front end sampling device 2, a rear end sampling device 3, a flue gas monitoring chamber 4 and a scraper 10;
a reaction cavity is arranged in the reaction tower 1, the reaction cavity is used for storing flue gas and performing deacidification treatment on the flue gas, the outlet end of the reaction cavity is connected with one end of a first sampling pipeline 5, the other end of the first sampling pipeline 5 is connected with the inlet end 301 of the rear-end sampling device 3, the inlet end 301 of the rear-end sampling device is provided with an active carbon injection device, the active carbon injection device is used for performing adsorption treatment on the flue gas, the outlet end 302 of the rear-end sampling device 3 is connected with the flue gas monitoring chamber 4 through a first connecting pipeline 6, and the middle part of the first connecting pipeline 6 is provided with an induced draft fan 60;
the first sampling pipeline 5 is provided with a second sampling pipeline 7, the second sampling pipeline 7 is a branch pipeline in the middle of a pipeline section of the first sampling pipeline 5, the second sampling pipeline 7 is connected with the inlet end of the front-end sampling device 2, the front-end sampling device 2 is used for filtering flue gas which is not deacidified thoroughly and performing dust removal treatment on the flue gas, and the outlet end of the front-end sampling device 2 is connected with monitoring equipment of the flue gas monitoring room 4 through a second connecting pipeline 8;
a vacuum sampling pump and monitoring equipment are arranged in the smoke monitoring chamber 4, the vacuum sampling pump provides extraction power for the front-end sampling device 2, and the monitoring equipment is used for analyzing and comparing the collected smoke in the front-end sampling device 2 and the rear-end sampling device 3;
The specific implementation process of the embodiment is as follows: the incinerator burns and produces the high dust flue gas that does not remove dust and deacidify and handles, stores and deacidify by reaction tower 1 and handles, filters the dust removal through rear end sampling device 3 afterwards, and the entry of rear end sampling device 3 is provided with active carbon injection apparatus (not shown in the figure), removes acid gas and dioxin in the flue gas, passes through draught fan 60 afterwards, discharges to the atmosphere and the monitoring facilities who connects flue gas monitoring room 4 through first connecting tube 6, and carry out composition analysis. Above-mentioned sampling process is the rear end sampling, and the flue gas that the rear end sampling was collected and is obtained has been through adsorption treatment, is unfavorable for carrying out the dioxin composition analysis in the flue gas, has consequently increased front end sampling system, gets rid of the influence of active carbon adsorption treatment to dioxin composition analysis, increases the accuracy of analysis.
The inlet end of front end sampling device 2 connects the pipeline section middle part of first sampling pipeline 5, guarantee sampling flue gas analysis's rationality, the power of sampling extraction is provided by the vacuum sampling pump of flue gas monitoring room 4, the pressure head of this pump is 250kpa, front end sampling device 2's exit end is connected to monitoring facilities, high concentration dust in the sampling flue gas has been filtered before getting into monitoring facilities, the front end flue gas of collection carries out composition analysis through monitoring facilities, and the data that the rear end flue gas that will reachd data and rear end sampling device 3 gathered reachs contrast, get rid of the influence of active carbon to the dioxin composition, be convenient for carry out subsequent dioxin composition analysis, increase the accuracy of analysis.
Further, the scraper conveyor 10 adopts a three-level operation mode, so that three scraper conveyors can work independently, the dust collection requirements of the reaction tower 1, the front-end sampling device 2 and the rear-end sampling device 3 are met, and the working efficiency is improved.
Further, the monitoring device is a dioxin automatic continuous sampling device, and can realize the functions of sampling end operation process data acquisition, sampling end temperature control device regulation and control, sampling end operation flow control, sampling end operation state monitoring, sampling end sampling gun servo system control, sampling end system self protection and the like.
In a further description, the front end sampling device 2 comprises a square box body 20 and an overhaul platform 21, wherein the square box body 20 is erected at the upper end of the scraper conveyor 10 through the overhaul platform 21;
a partition plate 22 is installed inside the square box body 20, the square box body 20 is divided into a smoke cleaning chamber located on the upper layer and a dust removing chamber located on the lower layer by the partition plate 22, a mounting hole 23 is formed in the partition plate 22, the mounting hole 23 is communicated with the smoke cleaning chamber and the dust removing chamber, a polytetrafluoroethylene filter bag 24 is detachably hung in the mounting hole 23, and the polytetrafluoroethylene filter bag 24 is used for filtering smoke which is not subjected to thorough deacidification and performing dust removal treatment on the smoke;
the smoke purifying chamber is connected with the second connecting pipeline 8, a first pneumatic butterfly valve 81 and a sampling probe 82 are arranged on the second connecting pipeline 8, and the first pneumatic butterfly valve 81 is used for controlling the second connecting pipeline 8 to be opened or closed;
the dust removal chamber is connected with the second sampling pipeline 7, a second pneumatic butterfly valve 71 is arranged on the second sampling pipeline 7, and the second pneumatic butterfly valve 71 is used for controlling the opening and closing of the second sampling pipeline 7;
the bottom of clean room is equipped with observation window 25, just the bottom of clean room has connected gradually toper ash bucket 26 and lower ash pipe 27, toper ash bucket 26 is connected through unloading grey valve 28 ash pipe 27 down, be equipped with observation hole 29 on ash pipe 27's the body down, the lower grey mouth of ash pipe 27 is located down scrape the upper end of trigger 10.
Front end sampling device 2 in this embodiment is at the during operation, the flue gas is at first got into and up floats from the clean room of lower floor, the granule is big, the dust of great proportion subsides and falls into toper ash bucket 26 because the effect of gravity, and because stopping of baffle 22, the flue gas must be through suspending in midair two polytetrafluoroethylene filter bags 24 at mounting hole 23 and can not directly shuttle to the clean room of upper strata, contain in the gas that more tiny dust is detained when passing through polytetrafluoroethylene filter bag 24, improve the filter effect of flue gas and make the flue gas purify simultaneously, the flue gas after the purification then flows out from the second connecting tube 8 of clean room and enters into sampling probe 82, the later stage's of being convenient for smoke detection.
Furthermore, the square box 20 is made of a steel plate with a thickness of 8mm, the length is 530mm, the width is 320mm, the height is 2300mm, 2 phi 160 x 1500 polytetrafluoroethylene filter bags 24 are arranged inside the square box 20, and a circle of #12 channel steel is welded on the periphery of the square box 20 for about 1.7m to serve as a hanging point of the partition plate 22. The dust removal chamber is also provided with an observation window 25 of 200mm, an observation hole 29 is arranged on the pipe body of the lower dust pipe 27, the observation window 25 and the square box body 20 and the lower dust pipe 27 and the observation hole 29 are connected by flanges, the observation window 25 is favorable for observing the dust removal condition in the dust removal chamber, when the filtered dust is observed to be excessively accumulated in the conical dust hopper 26, the operation of the front-end sampling device 2 can be suspended, and the dust discharge valve 28 is opened to enable the dust to fall to the scraper conveyor 10 along the lower dust pipe 27 and be transported away; the observation hole 29 is advantageous for observing the dust accumulation of the lower dust pipe 27 to adjust the operation speed of the scraper 10 to prevent clogging.
Further, a place reserved with a fan is reserved on the maintenance platform 21, and if the pipe diameter of the second sampling pipeline 7 of the front-end sampling device 2 changes in the later period, the pressure head of the vacuum sampling pump is insufficient, and the original lower part of the reserved place is reinforced by a corresponding beam, so that the front-end sampling device 2 is only required to be placed on the reserved place by the direct fan, communicated with the second connecting pipeline 8, and the sampling effect is guaranteed.
Further, a drain pipe 72 is further disposed on the second sampling pipe 7, the drain pipe 72 is a branch of the second sampling pipe 7, a drain valve 73 is disposed on the drain pipe 72, and the drain valve 73 is used for controlling a switch of the drain pipe 72.
In a further description, the pipe diameter of the second sampling pipe 7 gradually decreases from the outlet end of the reaction tower 1 to the inlet end of the front-end sampling device 2. The pipe diameter of second sampling pipeline 7 diminishes gradually in this embodiment is because the starting point of second sampling pipeline 7 is reaction tower 1 export section pipeline, and this place flue gas flow is great, if not carry out the reducing of pipeline then cause the pressure differential of reaction tower 1 export section and 2 junctions of front end sampling device too big easily, has the risk of bursting pipe, is unfavorable for front end sampling device 2's normal operating. Further, because during the sampling, the flue gas flow of reaction tower 1 export section pipeline is great, and when stopping the sampling, the temperature drop leads to remaining the flue gas here to condense and form hydrophobic, is unfavorable for the sampling, consequently sets up hydrophobic pipeline 72, is convenient for with the hydrophobic exhaust after the high temperature flue gas condenses. When the sampling device is used, the second pneumatic butterfly valve 71 is closed, the drain valve 73 is opened, accumulated water condensed in the second sampling pipeline 7 is discharged, the drain valve 73 is normally closed in other time, and the practicability of the front-end sampling device 2 is improved.
Further, the second connecting pipe 8 is a heat-tracing pipe, and the heating temperature of the heat-tracing pipe is 100-. In this embodiment, the front-end sampling smoke is filtered by the polytetrafluoroethylene filter bag 24 of the front-end sampling device 2 and then becomes clean smoke, and the clean smoke enters the heat tracing pipe from the outlet of the smoke cleaning chamber, and the heat tracing pipe is mainly used for connecting the smoke monitoring chamber 4 and the monitoring equipment at the rear end. The inner wall of the heat tracing pipeline is provided with a heating wire, so that the temperature of the flue gas in the pipeline can be kept at 100-200 ℃, and the temperature of the flue gas in the reaction tower 1 are kept unchanged to the greatest extent, so that the accuracy of flue gas analysis is improved.
In a further description, a cleaning device 9 is further arranged in the smoke cleaning chamber, and the cleaning device comprises a spray pipe 91 and a nozzle 92;
the spray pipe 91 penetrates through the square box body 20, the spray nozzle 92 is communicated with the spray pipe 91, and the spray nozzle 92 is positioned right above the polytetrafluoroethylene filter bag 24;
the input end of the spray pipe 91 is connected with a compressed air device, and a pressure reducing valve 93, a pressure gauge 94 and a cleaning electromagnetic valve 95 are sequentially connected in a connecting pipe section of the spray pipe 91 and the compressed air device.
In this embodiment, after the front end sampling device 2 is operated for a period of time, the excessive accumulation of dust on the polytetrafluoroethylene filter bag 24 can reduce the filtering effect of the polytetrafluoroethylene filter bag 24, and the polytetrafluoroethylene filter bag 24 can be blocked seriously, and at this time, the polytetrafluoroethylene filter bag 24 needs to be cleaned by using a cleaning device. A nozzle 92 is arranged on a spray pipe 91 connected with a smoke purifying chamber, the position of the nozzle 92 is positioned right above the two polytetrafluoroethylene filter bags 24, when the dust is cleaned by blowback, the first pneumatic butterfly valve 81 and the second pneumatic butterfly valve 82 are closed, the pressure reducing valve 93 is opened, by adjusting the pressure of the nozzle 91 to a pressure adapted to the interior of the second sampling device 2, and observing the indication of the pressure gauge 94, when the indication value is maintained in the proper pressure range, the cleaning electromagnetic valve 95 is opened, the compressed air in the compressed air device blows the polytetrafluoroethylene filter bag 24 through the guide of the spray pipe 91 and the nozzle 92 through the mounting hole 23, so that the polytetrafluoroethylene filter bag 24 expands and vibrates suddenly, therefore, the effect of removing dust on the polytetrafluoroethylene filter bag 24 is achieved, dust removal operation on the polytetrafluoroethylene filter bag 24 at regular intervals is beneficial to enhancing the service efficiency of the polytetrafluoroethylene filter bag 24, and the service life of the polytetrafluoroethylene filter bag 24 is prolonged. After the back blowing is completed, the dust discharging valve 28 is opened, so that the dust accumulated in the back blowing process is directly conveyed to the scraper 10 through the dust discharging pipe 27.
In this embodiment, the lance 91 is taken in close proximity from the compressed air main of the field device, a 57mm external diameter pipe is connected into the clean smoke chamber of the front end sampling apparatus 2, the other end of the pipe is closed, and two points are taken at the 57mm pipe section directly above the mounting hole 23, each connected to a 38mm external diameter pipe as a compressed air nozzle 92. In addition, the compressed air pipeline with the outer diameter of 57mm is provided with a detachable buckle when entering the square box body 20, so that the whole spray pipe 91 and the nozzle 92 are detached when the maintenance is convenient, 4 threaded movable joints are installed, the inlet and outlet ends of the electromagnetic valve 35 are 1 respectively, the inlet and outlet ends of the pressure reducing valve 93 are 1 respectively, and the pipeline is detached and the electromagnetic valve 95 and the pressure reducing valve 93 are cleaned to be replaced and maintained when the maintenance is convenient.
In a further description, the interior of the rear-end sampling device 3 is divided into a plurality of compartments 30, the plurality of compartments 30 are commonly connected with the first sampling pipeline 5 and the first connecting pipeline 6, an inlet end 301 of the rear-end sampling device 3 is provided with an air inlet valve 31, an outlet end 302 of the rear-end sampling device 3 is provided with an air outlet valve 32, a plurality of filter bags are vertically suspended in any one of the compartments 30, a universal dust hopper 33 is installed between adjacent compartments 30, and each adjacent compartment 30 is arranged in a front-back interval distribution;
the general ash bucket 33 is provided with a vibrator, an electric heat tracing device and a material level meter.
In this embodiment, flue gas generated by incineration of the waste incinerator is cooled in the reaction tower 1 and deacidified by lime slurry and the like, and enters the first sampling pipeline 5 shared by the compartments 30 of the rear end sampling device 3 through the outlet of the reaction tower 1 after being subjected to adsorption treatment by activated carbon at the inlet end 301 of the rear end sampling device 3, and a plurality of filter bags are vertically suspended in any compartment 30, so that the compartment 30 can fully purify and discharge polluted flue gas generated by incineration of waste. The flue gas passes through the filter bag from the outside of the filter bag and enters the inside of the filter bag, fly ash, lime slurry reactant and reaction product, condensed heavy metal, sprayed activated carbon and the like in the flue gas are adsorbed on the filter bag, a cake-shaped dust layer is formed outside the filter bag, the neutralization reaction of the reaction tower 1 and the adsorption of the activated carbon on harmful substances can be continued, the removal rate of acid gas is further improved, the activated carbon also further plays an adsorption role, and therefore the flue gas purification efficiency of the whole device is improved. The purified flue gas is connected with the induced draft fan 60 through the shared first connecting pipeline 6 and is discharged to the atmosphere through a chimney, and the environmental pollution caused by the incineration of the household garbage is greatly reduced.
Further, in order to maintain stable discharge of dust in the flue gas, a vibrator is arranged on the outer wall of the universal ash bucket 33, and the dust adsorbed on the inner wall of the compartment 30 or the filter bag is vibrated down under the vibration action of the vibrator so as to be subjected to centralized discharge treatment; in addition, when the bridging phenomenon occurs in the common hopper 33, the stacking height of the dust can be detected by the level gauge, and the temperature rises due to the dust stacking, so that the bridging phenomenon can be predicted by adding the electric heat tracing device and confirming the abnormal rise of the temperature by the temperature controller of the electric heat tracing device or the local thermometer. The vibrator, the electric heat tracing device and the level indicator in the embodiment are all electrically connected to the central control room, so that the temperature and the dust condition of the universal ash bucket 33 can be conveniently monitored at any time.
In a further description, the top of the plurality of compartments 30 is provided with corresponding cylinder poppet valves 34, electromagnetic valves 35 and injection pipes 36, one end of each injection pipe 36 is connected with the compressed air device, the other end of each injection pipe 36 is arranged right above the filter bag, the cylinder poppet valves 34 are used for controlling the on-off of the compressed air device, and the electromagnetic valves 35 are used for controlling the on-off of the injection pipes 36.
In the embodiment, the cleaning of the filter bag is realized by shaking off dust by using pulse air in the injection tube 36, in the process of cleaning the filter bag, the air inlet valve 31 and the air outlet valve 32 are closed, the passage between the smoke and the inlet end 301 and the outlet end 302 of the rear-section sampling device 3 is cut off, the air cylinder lift valve 34 and the electromagnetic valve 35 are opened, the injection tube 36 is injected by using compressed air in the state of smoke suspension, the dust deposition on the filter bag is effectively removed, after the dust removal is finished, the air cylinder lift valve 34 and the electromagnetic valve 35 are closed, the air inlet valve 31 and the air outlet valve 32 are actively opened, and the smoke enters again. Furthermore, in order to maintain the basic function of the rear-end sampling device 3, the cleaning can be performed one cabin at a time, and the cleaning effect is improved.
In a further illustration, an upper splitter plate 37 and a lower splitter plate 38 are disposed above a plurality of the compartments 30, and a splitter slot 39 is formed between the upper splitter plate 37 and the lower splitter plate 38;
one end of the upper splitter plate 37 is connected to the upper end of the inlet end 301 of the rear end sampling device 3, the other end of the upper splitter plate 37 is connected to the lower end of the outlet end 302 of the rear end sampling device 3, and the upper splitter plate 37 is obliquely arranged downwards from right to left;
one end of the lower splitter plate 38 is connected to the lower end of the inlet end 301 of the rear-end sampling device 3, the other end of the lower splitter plate 38 is connected to the lower end of the outlet end 302 of the rear-end sampling device 3, the lower splitter plate 38 is horizontally disposed, symmetrical splitter box connectors 391 are disposed at the lower end of the lower splitter plate 38, and the splitter box connectors 391 are respectively communicated with the adjacent bays 30.
Stated further, the angle α of inclination of the upper splitter plate 37 is 10 ° to 20 °.
In this embodiment, the diversion channel 39 is formed between the upper diversion plate 37 and the lower diversion plate 38, and can divert the flue gas of the first sampling channel into two rows of compartments 30 arranged in parallel in front of and behind each other, and in operation, the flue gas enters the diversion channel 39 from the inlet end 301 of the rear end sampling device 3, and is distributed into each compartment 30 through the symmetrical diversion channel interface 391, so as to ensure that the flue gas from the reaction tower 1 uniformly contacts each filter bag at an allowable flow rate, and thus, the flue gas is matched with the filter bag to achieve a better dust removal effect. Further, the angle of inclination of the upper splitter plate 37 is determined by the flue gas flow area, and since the cross-sectional area of the splitter 39 decreases the further the flue gas passes into the rear compartment 30, the lower the flue gas flow velocity, the preferred angle of the upper splitter plate in this embodiment is 15 °.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Other embodiments of the utility model will occur to those skilled in the art without the exercise of inventive faculty based on the explanations herein, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. The utility model provides a dioxin monitoring system suitable for high dust environment which characterized in that: the device comprises a reaction tower, a front-end sampling device, a rear-end sampling device, a flue gas monitoring chamber and a scraper conveyor;
the reaction tower is internally provided with a reaction cavity, the reaction cavity is used for storing flue gas and deacidifying the flue gas, the outlet end of the reaction cavity is connected with one end of a first sampling pipeline, the other end of the first sampling pipeline is connected with the inlet end of a rear-end sampling device, the inlet end of the rear-end sampling device is provided with an active carbon injection device, the active carbon injection device is used for adsorbing the flue gas, the outlet end of the rear-end sampling device is connected with the flue gas monitoring chamber through a first connecting pipeline, and the middle part of the pipeline of the first connecting pipeline is provided with an induced draft fan;
the first sampling pipeline is provided with a second sampling pipeline, the second sampling pipeline is a branch pipeline in the middle of a pipeline section of the first sampling pipeline, the second sampling pipeline is connected with the inlet end of the front-end sampling device, the front-end sampling device is used for filtering flue gas which is not thoroughly deacidified and performing dust removal treatment on the flue gas, and the outlet end of the front-end sampling device is connected with monitoring equipment of the flue gas monitoring room through a second connecting pipeline;
the smoke monitoring chamber is internally provided with a vacuum sampling pump and monitoring equipment, the vacuum sampling pump provides extraction power for the front-end sampling device, and the monitoring equipment is used for analyzing and comparing the collected smoke in the front-end sampling device and the collected smoke in the rear-end sampling device;
the scraper machine is respectively arranged at the lower ends of the reaction tower, the front end sampling device and the rear end sampling device, and is used for collecting dust discharged by the reaction tower, the front end sampling device and the rear end sampling device and transporting the dust to a specified place.
2. The dioxin monitoring system according to claim 1 is applied to a high dust environment, characterized in that: the front-end sampling device comprises a square box body and an overhauling platform, and the square box body is erected at the upper end of the scraper conveyor through the overhauling platform;
a partition board is arranged in the square box body, the square box body is divided into a smoke cleaning chamber located on the upper layer and a dust removing chamber located on the lower layer by the partition board, a mounting hole is formed in the partition board and is communicated with the smoke cleaning chamber and the dust removing chamber, a polytetrafluoroethylene filter bag is detachably hung in the mounting hole and is used for filtering smoke which is not thoroughly deacidified and removing dust of the smoke;
the smoke purifying chamber is connected with the second connecting pipeline, a first pneumatic butterfly valve and a sampling probe are arranged on the second connecting pipeline, and the first pneumatic butterfly valve is used for controlling the second connecting pipeline to be opened and closed;
the dust removal chamber is connected with the second sampling pipeline, a second pneumatic butterfly valve is arranged on the second sampling pipeline, and the second pneumatic butterfly valve is used for controlling the opening and closing of the second sampling pipeline;
the bottom of clean room is equipped with the observation window, just the bottom of clean room has connected gradually toper ash bucket and lower ash pipe, the toper ash bucket is connected through unloading the grey valve ash pipe down, be equipped with the observation hole on the body of ash pipe down, the lower ash mouth of ash pipe is located down scrape the upper end of trigger.
3. The dioxin monitoring system according to claim 2 is applied to a high dust environment, and is characterized in that: and a drain pipe is also arranged on the second sampling pipe, the drain pipe is a branch of the second sampling pipe, and a drain valve is arranged on the drain pipe and is used for controlling the switch of the drain pipe.
4. The dioxin monitoring system according to claim 3 is applied to a high dust environment, and is characterized in that: the pipe diameter of the second sampling pipeline is gradually reduced from the outlet end of the reaction tower to the inlet end of the front-end sampling device.
5. The dioxin monitoring system according to claim 2 is applied to a high dust environment, and is characterized in that: the second connecting pipeline is a heat tracing pipeline, and the heating temperature of the heat tracing pipeline is 100-200 ℃.
6. The dioxin monitoring system suitable for the high dust environment according to claim 2, wherein a cleaning device is further provided in the smoke cleaning chamber, and the cleaning device comprises a spray pipe and a spray nozzle;
the spray pipe penetrates through the square box body, the spray nozzle is communicated with the spray pipe, and the spray nozzle is positioned right above the polytetrafluoroethylene filter bag;
the input end of the spray pipe is connected with a compressed air device, and a pressure reducing valve, a pressure gauge and a cleaning electromagnetic valve are sequentially connected in a connecting pipe section of the spray pipe and the compressed air device.
7. The dioxin monitoring system according to claim 6 is applied to a high dust environment, and is characterized in that: the interior of the rear-end sampling device is divided into a plurality of compartments, the compartments are connected with the first sampling pipeline and the first connecting pipeline together, an air inlet valve is arranged at the inlet end of the rear-end sampling device, an air outlet valve is arranged at the outlet end of the rear-end sampling device, a plurality of filter bags are vertically suspended in any one of the compartments, a universal ash bucket is arranged between the adjacent compartments, and the adjacent compartments are distributed at intervals from front to back;
the universal ash bucket is provided with a vibrator, an electric heat tracing device and a material level meter.
8. The dioxin monitoring system according to claim 7 is applied to a high dust environment, and is characterized in that: the top of the compartments is provided with corresponding cylinder lift valves, electromagnetic valves and injection pipes, one end of each injection pipe is connected with the compressed air device, the other end of each injection pipe is arranged right above the filter bag, the cylinder lift valves are used for controlling the on-off of the compressed air devices, and the electromagnetic valves are used for controlling the on-off of the injection pipes.
9. The dioxin monitoring system according to claim 8 is applied to a high dust environment, and is characterized in that: an upper splitter plate and a lower splitter plate are arranged between the adjacent compartments, and a splitter groove is formed between the upper splitter plate and the lower splitter plate;
one end of the upper splitter plate is connected with the upper end of the inlet end of the rear-end sampling device, the other end of the upper splitter plate is connected with the lower end of the outlet end of the rear-end sampling device, and the upper splitter plate is obliquely and downwards arranged from right to left;
one end of the lower splitter plate is connected with the lower end of the inlet end of the rear-end sampling device, the other end of the lower splitter plate is connected with the lower end of the outlet end of the rear-end sampling device, the lower splitter plate is horizontally arranged, symmetrical splitter box connectors are arranged at the lower end of the lower splitter plate, and the splitter box connectors are respectively communicated with the adjacent compartments.
10. The dioxin monitoring system according to claim 9 is applied to a high dust environment, and is characterized in that: the inclination angle of the upper splitter plate is 10-20 degrees.
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| CN202122870166.7U CN216386967U (en) | 2021-11-19 | 2021-11-19 | Dioxin monitoring system suitable for high dust environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114152714A (en) * | 2021-11-19 | 2022-03-08 | 瀚蓝绿电固废处理(佛山)有限公司 | Dioxin monitoring system suitable for high dust environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114152714A (en) * | 2021-11-19 | 2022-03-08 | 瀚蓝绿电固废处理(佛山)有限公司 | Dioxin monitoring system suitable for high dust environment |
| CN114152714B (en) * | 2021-11-19 | 2024-08-13 | 瀚蓝绿电固废处理(佛山)有限公司 | Dioxin monitoring system suitable for high dust environment |
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