Heavy metal enrichment plant processing system
阅读说明：本技术 一种重金属富集植物处理系统 (Heavy metal enrichment plant processing system ) 是由 何曦 戴欣 奉新锋 周益辉 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种重金属富集植物处理系统,包括焚烧炉、预处理箱、两级喷淋塔和布袋除尘器；所述预处理箱的顶部设置有出气口,底部设置有进气口和灰斗,预处理箱内设置有多层支撑网；所述焚烧炉的出气端通过管道与预处理箱的进气口连通,所述预处理箱的出气口通过管道与第一级喷淋塔的进气端连通,第一级喷淋塔的出气端通过管道与第二级喷淋塔的进气端连通,第二级喷淋塔的出气端通过管道与布袋除尘器的进气端连通。该结构的植物处理系统,能对植物快速进行干燥,不会向环境释放有毒有害物质,同时,保证了干燥效率。(The invention discloses a heavy metal enriched plant treatment system, which comprises an incinerator, a pretreatment box, two stages of spray towers and a bag-type dust collector; the top of the pretreatment box is provided with an air outlet, the bottom of the pretreatment box is provided with an air inlet and an ash bucket, and a plurality of layers of support nets are arranged in the pretreatment box; the gas outlet end of the incinerator is communicated with the gas inlet of the pretreatment tank through a pipeline, the gas outlet of the pretreatment tank is communicated with the gas inlet end of the first-stage spray tower through a pipeline, the gas outlet end of the first-stage spray tower is communicated with the gas inlet end of the second-stage spray tower through a pipeline, and the gas outlet end of the second-stage spray tower is communicated with the gas inlet end of the bag-type dust collector through a pipeline. The plant treatment system with the structure can dry plants quickly, does not release toxic and harmful substances to the environment, and simultaneously ensures the drying efficiency.)
1. A heavy metal enrichment plant processing system which characterized in that: comprises an incinerator, a pretreatment tank, a two-stage spray tower and a bag-type dust collector; the top of the pretreatment box is provided with an air outlet, the bottom of the pretreatment box is provided with an air inlet and an ash bucket, and a plurality of layers of support nets are arranged in the pretreatment box; the gas outlet end of the incinerator is communicated with the gas inlet of the pretreatment tank through a pipeline, the gas outlet of the pretreatment tank is communicated with the gas inlet end of the first-stage spray tower through a pipeline, the gas outlet end of the first-stage spray tower is communicated with the gas inlet end of the second-stage spray tower through a pipeline, and the gas outlet end of the second-stage spray tower is communicated with the gas inlet end of the bag-type dust collector through a pipeline.
2. The heavy metal-enriched plant treatment system of claim 1, wherein: the support net is assembled with the pretreatment box in a sealed drawing mode.
3. The heavy metal-enriched plant treatment system of claim 2, wherein: the air inlet and the air outlet of the pretreatment box are provided with an electromagnetic valve, a temperature sensor and a humidity sensor, and the pretreatment box further comprises a controller, wherein the controller is electrically connected with the electromagnetic valve, the temperature sensor and the humidity sensor respectively.
4. The heavy metal-enriched plant treatment system of claim 3, wherein: the outside of the pretreatment tank is coated with a heat insulation material layer.
5. The heavy metal-enriched plant treatment system of any one of claims 1 to 4, wherein: comprising three pretreatment tanks arranged in parallel.
Technical Field
The invention relates to the technical field of heavy metal-enriched plant incineration, in particular to a heavy metal-enriched plant treatment system.
Background
Agricultural non-point source pollution is an important factor influencing food safety in China, and restoration of moderate and mild heavy metal polluted farmlands becomes the focus of attention of the whole people. The phytoremediation method is low in cost, high in applicability and capable of thoroughly separating heavy metals from soil, and is widely applied.
Plants rich in heavy metals need to be treated, and the burning method is an effective means for reduction. However, the water content of the enriched plants is high, which can reach more than 95 wt.%, so that the enriched plants cannot be directly incinerated and need to be dehydrated. The airing is the most common method at present, but the airing has the defects in several aspects: firstly, the influence of climate is large, the southern area has sufficient rainwater, and rainstorm often occurs even in extremely hot summer; secondly, when the plants are aired, toxic and harmful substances can be released by the plants at high temperature (for example, when organic matter pollution exists in a farmland, the plants can also absorb and enrich), so that environmental pollution is easily caused; thirdly, the airing period is long, half a month in short and several months in long, which results in that the enriched plants can not be processed in time.
Disclosure of Invention
In view of the above, the invention provides a heavy metal-enriched plant treatment system without airing, aiming at the defect of removing water in heavy metal-enriched plants by using the existing airing method, so as to ensure that the plant drying process is not influenced by climate, toxic and harmful substances are not released into the environment, and meanwhile, the drying efficiency of the plants is improved.
The invention solves the problems through the following technical means: a heavy metal enrichment plant treatment system comprises an incinerator, a pretreatment tank, a two-stage spray tower and a bag-type dust collector; the top of the pretreatment box is provided with an air outlet, the bottom of the pretreatment box is provided with an air inlet and an ash bucket, and a plurality of layers of support nets are arranged in the pretreatment box; the gas outlet end of the incinerator is communicated with the gas inlet of the pretreatment tank through a pipeline, the gas outlet of the pretreatment tank is communicated with the gas inlet end of the first-stage spray tower through a pipeline, the gas outlet end of the first-stage spray tower is communicated with the gas inlet end of the second-stage spray tower through a pipeline, and the gas outlet end of the second-stage spray tower is communicated with the gas inlet end of the bag-type dust collector through a pipeline.
Further, the support net is assembled with the pretreatment tank in a sealed drawing mode.
Further, the air inlet and the gas outlet of preliminary treatment case all are provided with solenoid valve, temperature sensor and humidity transducer, still include the controller, the controller is connected with solenoid valve, temperature sensor and humidity transducer electricity respectively.
Further, the outside of the pretreatment tank is coated with a heat insulation material layer.
Further, three pretreatment tanks arranged in parallel are included.
The invention has the beneficial effects that: the heavy metal enrichment plant treatment system comprises an incinerator, a pretreatment tank, a two-stage spray tower and a bag-type dust collector; the top of the pretreatment box is provided with an air outlet, the bottom of the pretreatment box is provided with an air inlet and an ash bucket, and a plurality of layers of support nets are arranged in the pretreatment box; the gas outlet end of the incinerator is communicated with the gas inlet of the pretreatment tank through a pipeline, the gas outlet of the pretreatment tank is communicated with the gas inlet end of the first-stage spray tower through a pipeline, the gas outlet end of the first-stage spray tower is communicated with the gas inlet end of the second-stage spray tower through a pipeline, and the gas outlet end of the second-stage spray tower is communicated with the gas inlet end of the bag-type dust collector through a pipeline. The plant treatment system with the structure can dry plants quickly, does not release toxic and harmful substances to the environment, and simultaneously ensures the drying efficiency. Particularly, the beneficial effects of the invention are also reflected in the following points:
1) the enriched plants are dried without being influenced by climate;
2) the drying efficiency of the enriched plants is improved by stable and continuous heat supply;
3) completely collecting toxic and harmful substances generated in the drying process, and enabling the toxic and harmful substances to enter a subsequent purification system;
4) the waste heat in the flue gas is effectively utilized;
5) the heavy metal-enriched plants absorb a large amount of heat in the flue gas, so that the burden of the spray tower is reduced (after the spray liquid absorbs the heat in the flue gas and is heated, heat dissipation treatment is needed);
6) the 'weaving mode' accumulation of the heavy metal enriched plants can enhance the turbulence degree of airflow (beneficial to uniform heating) on one hand, and the pore channel structure formed by accumulation can intercept particulate matters in smoke on the other hand;
7) a large amount of water molecules are generated in the drying process of the heavy metal-enriched plants, and the flocculation and sedimentation of particles in the flue gas are accelerated by the water molecules, so that the burden of subsequent purification equipment is reduced;
8) the water in the heavy metal enriched plant is utilized, and the water consumption of the system is reduced.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a schematic view of a pretreatment tank.
Detailed Description
The invention is explained in more detail below with reference to the figures and examples. The features and advantages of the present invention will become more apparent from the description. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments.
As shown in fig. 1-2, the heavy metal-enriched plant treatment system of the present embodiment includes an
When the device is used, flue gas generated by the incinerator enters the pretreatment box, the pretreatment box is a box body with air inlet at two ends of the lower part and air outlet at the top, and the box body is surrounded by heat insulation materials. The inside of the pretreatment box body is provided with a plurality of layers of supporting nets, and the harvested heavy metal-enriched plants are tightly stacked on the supporting nets according to a certain layering sequence to form a dense hemp and intricate pore structure to fill the inner space of the pretreatment box. After the flue gas enters the pretreatment box from the lower part, the high-temperature flue gas bakes the heavy metal-enriched plants in the pretreatment box, the pore channel formed by the accumulation of the heavy metal-enriched plants has an interception effect on dust in the flue gas, and moisture released by the heavy metal-enriched plants is diffused in the pore channel formed by the accumulation of the heavy metal-enriched plants, so that the capture and sedimentation of particles in the flue gas are facilitated. The residual gas-borne pollutants are discharged from the top of the pretreatment box along with the gas flow and enter two stages of spray towers, the spray towers treat the pollutants in the flue gas, the pollutants are condensed to recover the moisture in the gas flow, and the treated flue gas is discharged to the atmosphere after being treated by a cloth bag filter.
As a further improvement to the technical scheme, the air inlet and the air outlet of the pretreatment tank are respectively provided with an electromagnetic valve, a temperature sensor and a humidity sensor, and the pretreatment tank further comprises a controller which is respectively electrically connected with the electromagnetic valve, the temperature sensor and the humidity sensor. If the temperature of the air outlet exceeds the temperature of the air inlet, the signal is fed back to the controller, the controller immediately sends a closing signal to the electromagnetic valve, the air inlet and the air outlet are closed in a mode of closing the electromagnetic valve, and possible fire caused by open fire combustion in the pretreatment tank is restrained in an oxygen-deficient mode. When the humidity of the air outlet is substantially identical to the humidity of the air inlet, it can be considered that the enriched plant has completed drying. The solenoid valve, the temperature sensor, the humidity sensor and the controller are all existing devices and are not shown in the attached drawings.
As a further improvement to the above technical solution, the pretreatment tanks may be arranged in parallel in three, one for drying, one for cooling, and one for filling with new heavy metal-enriched plants. Thus, the whole system can realize continuous operation.
Preferably, the heavy metal-enriched plants on the supporting net are stacked in a weaving mode, namely, the heavy metal-enriched plants are closely stacked in a mode of forming a certain included angle between an upper layer and a lower layer.
In conclusion, the plant treatment system can dry plants quickly, does not release toxic and harmful substances to the environment, and ensures the drying efficiency.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
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