CN214051026U - Casting flue gas treatment facility - Google Patents
Casting flue gas treatment facility Download PDFInfo
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- CN214051026U CN214051026U CN202121064950.2U CN202121064950U CN214051026U CN 214051026 U CN214051026 U CN 214051026U CN 202121064950 U CN202121064950 U CN 202121064950U CN 214051026 U CN214051026 U CN 214051026U
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Abstract
The utility model discloses a casting flue gas treatment device, which comprises a first absorption tower and a second absorption tower which are connected in series, and further comprises a medicament tank, wherein a medicament solution in the medicament tank is conveyed to the first absorption tower and the second absorption tower through a pump; an atomizing nozzle is arranged at the upper part in the first absorption tower; the second absorption tower comprises a plurality of layers of packing layers which are arranged at intervals, different spraying devices are correspondingly arranged on each layer of packing layer, and the different spraying devices respectively form non-vaporific water flow and water mist into the medicament solution; the casting flue gas is treated by the first absorption tower and the second absorption tower in sequence and then is emptied or enters a subsequent treatment device. The utility model discloses a casting flue gas treatment facility simple structure can effective processing casting flue gas, reaches emission standard.
Description
Technical Field
The utility model belongs to the technical field of the flue gas is handled, concretely relates to casting flue gas treatment facility.
Background
With the development of casting technology, resin sand molds such as self-hardening furan resin and phenolic resin sand are widely adopted in China for casting, so that the production period is shortened, the production efficiency is improved, and the appearance quality of castings is also improved. However, when the resin sand mold is cast and cooled, very thick smoke can be emitted, and due to the baking of high-temperature molten aluminum, molten iron and molten steel, smoke components not only comprise smoke dust and CO, but also can generate decomposed organic substances and resin oily volatile matters with high viscosity. At present, in the casting industry of China, on a resin sand molding production line, the smoke of a pouring section and a cooling gallery is generally directly discharged by a fan without a dust remover, so that pollution transfer is caused, the indoor environment is cleaned, the atmosphere is polluted, and the emission does not reach the standard. The organic waste gas mixed in the air not only causes environmental pollution, but also harms human health, and the organic waste gas pollution in the casting production becomes one of the focus problems of industry attention. The method solves the problem of organic waste gas pollution in casting production by adopting an economic and effective method, and has important practical significance for sustainable development of casting industry and ecological civilization construction of China.
At present, the treatment problem of organic waste gas containing other components generated in a foundry (namely, smoke dust can be effectively filtered and harmful gas can be effectively treated) is not reported, and the organic waste gas pollution treatment work of the foundry is just started.
However, in the industries of petroleum, chemical industry, printing and the like, various economic and effective treatment methods are available for treating organic waste gas. However, due to the characteristics of low organic matter concentration and low gas production of organic waste gas in the casting industry, it is difficult to directly use the organic waste gas treatment methods in the industries.
SUMMERY OF THE UTILITY MODEL
The utility model provides a casting flue gas treatment facility can effective processing casting flue gas, reaches emission standard.
The technical scheme of the utility model as follows:
a casting flue gas treatment device comprises a first absorption tower and a second absorption tower which are connected in series, and further comprises a reagent tank, wherein a reagent solution in the reagent tank is conveyed to the first absorption tower and the second absorption tower through a pump;
an atomizing nozzle is arranged at the upper part in the first absorption tower;
the second absorption tower comprises a plurality of layers of packing layers which are arranged at intervals, different spraying devices are correspondingly arranged on each layer of packing layer, and the different spraying devices respectively form non-vaporific water flow and water mist into the medicament solution;
the casting flue gas is treated by the first absorption tower and the second absorption tower in sequence and then is emptied or enters a subsequent treatment device.
Preferably, the bottom of the first absorption tower and/or the bottom of the second absorption tower are/is provided with a cyclone separator.
Preferably, the spraying device comprises a fire-fighting spraying head and a water mist nozzle, water forms an umbrella-shaped water flow layer through the fire-fighting spraying head, and the medicament solution forms 0.01-0.15mm granular water mist or fine water mist through the water mist nozzle.
Preferably, the upper part of the second absorption tower is provided with an air outlet, the lower part of the second absorption tower is provided with an air inlet, and the fire-fighting spray header is arranged above the uppermost layer of the packing of the second absorption tower.
Preferably, the water mist nozzle comprises a spiral nozzle and a solid cone nozzle.
Preferably, the spiral nozzle is disposed above the solid cone nozzle.
Preferably, the filler of the filler layer is selected from ring-shaped filler, spherical filler and water curtain filler, and is preferably water curtain filler.
Preferably, a plurality of the atomizer nozzles are arranged in the first absorption tower at intervals along the horizontal direction, a plurality of the atomizer nozzles are arranged at intervals along the vertical direction, and the atomizer nozzles are high-pressure nozzles.
Preferably, the medicament tank is provided in one or more, and the same or different medicament tank is connected to the first absorption tower and the second absorption tower through pipelines; a first liquid discharge port is formed in the bottom of the first absorption tower, and the medicine solution in the first absorption tower is conveyed to a second absorption tower or a medicine tank through the first liquid discharge port; and a second liquid outlet is formed in the bottom of the second absorption tower, and the medicine solution in the second absorption tower is conveyed to the medicine tank through the second liquid outlet.
Preferably, a separation net is arranged in the medicament groove, and the separation net separates the first liquid discharge port/the second liquid discharge port from the liquid inlet of the pump.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses a through two absorption towers of establishing ties, combine first absorption tower upper portion atomizer with the medicament solution formation medicament spraying, with abundant and flue gas contact, on the one hand the medicament spraying contact reaches to detach harmful gas with the gas reaction in the flue gas, on the other hand the medicament spraying contacts and condenses with the dust and reaches further dust fall effect, the second absorption tower sets up different spray set through multilayer packing layer, form rivers, water smoke mainly plays and continues to remove dust, the reaction, rivers mainly play and remove water smoke concurrently and react, the dust fall effect, can further react and remove harmful gas and a small amount of dust;
secondly, the first absorption tower separates dust through the cyclone separator at the bottom of the tower and/or the second absorption tower separates dust through the cyclone separator at the bottom of the tower, and makes gas form spiral airflow, reduces the gas flow rate, increases the residence time for subsequent atomization and dust removal, and most of liquid medicament in the first/second absorption tower flows into the cyclone separator from the gas outlet of the cyclone separator, flows to the bottom of the first/second absorption tower from the conical lower opening of the cyclone separator, and the liquid medicament in the cyclone separator can also play a certain dust-settling role;
thirdly, the second absorption tower of the utility model forms water flow to react with gas through the fire-fighting spray head by selecting different spray heads, and on the other hand, water mist can be removed through the adsorption of non-vaporific water flow; the fire sprinkler head is preferably arranged above the uppermost layer of the packing (closer to the air outlet compared with other spraying devices), so that water mist can be prevented from entering the subsequent stage; the water mist nozzle is adopted to form water mist or fog which can further contact and react with gas, so that the absorption effect is improved;
the utility model discloses a medicament of solid nozzle department is mainly vaporific for with gaseous reaction, the medicament at spiral nozzle department is mainly big liquid droplet water smoke or rivers and big liquid droplet water smoke for with gaseous reaction and adsorb the water smoke, can further defogging through the static is produced in the aqueous humor flow that spiral nozzle sprays, set up spiral nozzle above solid awl nozzle, when strengthening the absorption, preliminary defogging links up follow-up defogging step, can strengthen the defogging effect;
fifth, the utility model discloses a pack and select cascade filler, liquid drip on the cascade filler after along packing fibrous top-down flow, the whole body forms layer upon layer water film, contacts with the gas that gets into simultaneously, can realize the abundant contact of gas-liquid to, the gas pressure through the cascade reduces, thereby fan power requires lowly, makes the running cost low.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a schematic view of a casting flue gas treatment device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a first absorption tower according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a second absorption tower according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of another second absorption tower according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a spraying device of the second absorption tower according to the embodiment of the present invention;
fig. 6 is a schematic structural view of another spraying device of the second absorption tower according to the embodiment of the present invention;
fig. 7 is a schematic structural view of another spraying device of the second absorption tower according to the embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. In practical applications, the improvement and adjustment made by those skilled in the art according to the present invention still belong to the protection scope of the present invention.
For better illustration of the present invention, the present invention is described in detail below with reference to fig. 1 to 7.
Examples
With reference to fig. 1-3, a casting flue gas treatment device comprises a first absorption tower 1 and a second absorption tower 2 connected in series, and further comprises a medicament tank 3, wherein a medicament solution in the medicament tank 3 is delivered to the first absorption tower 1 and the second absorption tower 2 by a pump;
an atomizing nozzle 12 is arranged at the upper part in the first absorption tower 1;
the second absorption tower 2 comprises a plurality of layers of packing layers 24 arranged at intervals, and different spraying devices 22 are correspondingly arranged on each layer of packing layer 24; different spraying devices 22 respectively form the medicament solution into non-atomized water flow and water mist;
the casting flue gas is treated by the first absorption tower 1 and the second absorption tower 2 in sequence and then is exhausted or enters a subsequent treatment device.
Through two absorption towers 1, 2 of establishing ties, combine 1 upper portion atomizer 12 of first absorption tower to form the medicament solution and spray, contact with the flue gas fully, on the one hand, the gaseous reaction in medicament spray contact and the flue gas reaches and gets rid of harmful gas, on the other hand medicament spray contacts and condenses with the dust and reaches further dust fall effect, second absorption tower 2 sets up different spray set 22 through multilayer packing layer 24, form rivers respectively, water smoke mainly plays and continues to remove dust, the reaction, rivers mainly play and remove water smoke and have the reaction concurrently, the dust fall effect, harmful gas and a small amount of dirt can be detached in further reaction, and can get rid of water smoke. Through the cooperation of the two absorption towers, the flue gas treatment effect is improved, so that the flue gas treatment rate reaches more than 90%.
Referring to fig. 4, when the bottom of the second absorption tower is provided with the cyclone separator 4, the gas inlet 25 at the bottom of the second absorption tower is communicated with the gas inlet of the cyclone separator 4, the gas from the first absorption tower enters the cyclone separator 4 through the gas inlet 25, enters the second absorption tower 2 from the top opening of the cyclone separator 4 after cyclone separation, is treated by the multilayer packing layer 24, is discharged from the gas outlet 21, and can be emptied or introduced into the next treatment device.
The first absorption tower bottom opening 13 may serve as a gas inlet, and the upper opening 14 may serve as a gas outlet; conversely, the first absorption tower bottom opening 13 may serve as an air outlet and the upper opening 14 may serve as an air inlet. When the tower bottom 1 of the first absorption tower is provided with a cyclone separator, not shown in the figure, referring to fig. 4, the bottom opening 13 of the first absorption tower can be used as an air inlet, the bottom opening 13 is also communicated with the air inlet of the cyclone separator, the upper opening 14 can be used as an air outlet, the casting smoke enters the cyclone separator through the bottom opening 13, enters the first absorption tower 1 from the top opening of the cyclone separator after cyclone separation, and is discharged from the upper opening 14 and introduced into the second absorption tower 2 after the spraying action in the first absorption tower 1.
The first absorption tower 1 separates dust through the cyclone separator at the bottom of the tower and/or the second absorption tower separates dust through the cyclone separator at the bottom of the tower, and the gas forms spiral airflow, the gas flow speed is reduced, the retention time is increased for subsequent atomization and dust removal, most of the liquid medicament in the first/second absorption tower flows into the cyclone separator from the gas outlet of the cyclone separator, and flows to the bottom of the first/second absorption tower from the conical lower opening of the cyclone separator, and the liquid medicament in the cyclone separator can also play a certain dust-settling role.
Leading to pipe 11 has a plurality ofly along horizontal direction interval arrangement in the first absorption tower 1 atomizer 12, leading to pipe along vertical direction interval arrangement have a plurality ofly atomizer 12 through atomizer 12's setting for can be full of medicament water smoke in the first absorption tower, and form multistage absorption state along the entering direction of flue gas. Further preferably, the atomizer 12 is a high pressure atomizer, and atomizes the liquid medicament sufficiently to form a mist with smaller particles, so as to improve absorption and dust removal efficiency.
The second absorption tower 2 can form the medicament solution into different water flow/water mist states through different spraying devices 22 to achieve water absorption and mist elimination effects, specifically, referring to fig. 5-7, the spraying devices 22 can include a fire sprinkler 231 and water mist nozzles 232 and 233, the medicament solution forms an umbrella-shaped water flow layer through the fire sprinkler 231, the umbrella-shaped water flow body is large in thickness, has large water flow large-range spraying, reacts with gas, and is more beneficial to water mist elimination, a schematic diagram of a fire sprinkler head structure can refer to fig. 5, and of course, other fire sprinkler heads with proper structures can be selected according to needs; the water outlets of the fire-fighting spray header 231 form an umbrella-shaped water flow layer which covers the tower body completely, gas containing water mist enters the water flow layer, the water mist is absorbed by the water flow layer to realize a good de-misting effect, and the airflow resistance of the water flow layer is small; in a more preferred embodiment, a plurality of fire-fighting spray headers arranged in parallel can be combined to form a thicker water flow layer which completely covers the tower body, and the absorption and demisting effects of the thick water flow layer are better. If the follow-up odour removal device that still is provided with catalytic oxidation of second absorption tower, the catalytic effect of catalyst can receive the water smoke influence in it, perhaps needs to reach "white that disappears" that discharges the requirement, then need strengthen the interior water smoke effect of second absorption tower, preferably, can with the fire sprinkler head set up in the top of the superiors of second absorption tower packs, is closer to the gas outlet than other spray set to ensure the water smoke effect of gaseous last process in the second absorption tower.
A molecular sieve catalyst can be arranged in the odor removal device which is subsequently provided with catalytic oxidation so as to treat benzene series, aldehydes, methyl naphthalene, xanthene, nitrogen oxides and carbon oxides, and the first two absorption towers are used for treating gases which are not completely treated and escape to the odor removal device.
The agent solution forms 0.01-0.15mm granular water mist or fog through the water mist nozzles 232 and 233, so that water mist drops in the smoke are adsorbed on one hand, and the agent solution reacts with the gas on the other hand. Alternatively, the water mist nozzles include, but are not limited to, a spiral nozzle 232, a solid cone nozzle 233. The chemicals at the spiral nozzle are mainly large-droplet water mist or water flow and large-droplet water mist, and are used for reacting with gas and adsorbing the water mist, and the water flow sprayed by the spiral nozzle generates static electricity to further demist, and the structural schematic diagram of the spiral nozzle is shown in fig. 6. The medicament solution is atomized at the solid cone nozzle, mainly used for reacting with gas, and the structural schematic diagram of the solid cone nozzle can be seen in fig. 7. The spiral nozzle and the solid cone nozzle are not limited in position in the tower, and certainly, in order to achieve the optimal demisting effect, the fire sprinkler head is arranged above the top layer mainly used for demisting, the spiral nozzle can be preferably arranged above the solid cone nozzle, so that preliminary demisting of the spiral nozzle can be connected with the demisting of the follow-up fire sprinkler head in a progressive mode, and the demisting effect is enhanced.
The types of the spraying devices 22 and the number of layers of the packing layer 24 can be set according to requirements, and when the packing layer 24 can be set into two layers for the lower standard flue gas treatment emission requirement, the spraying devices 22 can select two of the fire-fighting spray header 231, the spiral nozzles 232 and the solid cone nozzles 233 according to requirements; when the emission standard of flue gas treatment is higher, and the packing layer 24 is provided with three or more layers, the spraying device 22 can select at least two of the fire-fighting spray header 231, the spiral nozzle 232 and the solid cone nozzle 233 according to the requirement; if a better demisting effect is needed, the fire-fighting spray header can be selected to be combined with other spray devices for use, and the fire-fighting spray header is arranged above the uppermost layer of the filler.
The fire-fighting spray header 231 is generally used in the field of fire protection, the spiral nozzle 232 is generally used for large-scale dust removal in large-scale coal power plants, the solid cone nozzle 233 is generally used for spraying agricultural pesticides, and through the deep research on casting flue gas, the applicant combines and distributes spray devices in different fields for casting flue gas treatment, and designs and obtains an absorption tower more suitable for treating the casting flue gas. The fire sprinkler head 231, the spiral nozzle 232 and the solid cone nozzle 233 have specific structure, model, size and other parameters, which can be selected according to specific requirements, and are not specifically developed here.
For each packing layer 24, the packing can be selected from the existing packing such as annular packing, spherical packing, water curtain packing and the like, and is preferably the water curtain packing certainly, liquid flows from top to bottom along the fiber on the packing after dropping on the water curtain packing, so that a layer of water film is integrally formed, and simultaneously, the liquid is contacted with the entering gas, the gas and the liquid can be fully contacted, moreover, the gap width resistance of the water curtain is consistent, the wind resistance is small, the pressure drop of the gas passing through the water curtain is greatly reduced, and therefore, the requirement on the power of the fan is low, and the running cost is low.
A first liquid discharge port is formed at the bottom of the first absorption tower, the first absorption tower has less medicament solution, and the medicament solution in the first absorption tower can be conveyed to a second absorption tower or a medicament tank through the first liquid discharge port; and a second liquid outlet is formed in the bottom of the second absorption tower, and the medicine solution in the second absorption tower is conveyed to the medicine tank through the second liquid outlet.
The medicament tank 3 is provided with a separation net (not shown in the figure), the first liquid discharge port/the second liquid discharge port is separated from the liquid inlet of the pump by the separation net, salt generated by reaction in the first absorption tower and the second absorption tower and dust particles in smoke subsided to form solid waste residue, and the solid waste residue enters the medicament tank through the liquid discharge port, and the solid waste residue can be prevented from entering the liquid inlet of the pump by the arrangement of the separation net.
Furthermore, in order to reduce energy consumption, only one pump can be arranged to be connected with the first absorption tower and the atomization nozzles and the spraying devices corresponding to the second absorption tower, so that energy consumption is reduced, different pipe diameters or valve opening degrees of the pipelines are further selected through the pipelines, different water flow rates and different pressures of the pipelines can be realized to match the corresponding atomization nozzles and the corresponding spraying devices, and water flow or water mist can be conveniently and properly formed, for example, the pipe diameter of the pipeline of the fire-fighting spray header or the valve opening degree is larger than that of other pipelines.
In the above embodiment, as shown in fig. 1, the chemical agent tanks 3 are provided in one, the chemical agent solutions in the chemical agent tanks are the same, and the chemical agent solutions entering the first absorption tower and the second absorption tower from the chemical agent tanks are the same through the pipeline and the chemical agent tanks. Of course, in other embodiments (not shown), the reagent tank is provided in a plurality of, for example, two, and the reagent solutions in the two reagent tanks are different, and the reagent solution entering the first absorption tower and the second absorption tower from the reagent tank is also different by the arrangement of the pipeline and the reagent tank.
By the invention, two-stage treatment is formed, and different types of substances can be respectively treated at different stages. The first-stage spray tower can treat alcohols, alkenes and naphthenes; the secondary spray tower can treat ketone, phenol, lipid, anhydride and furan. Or the first-stage spray tower can treat ketones, phenols, lipids, acid anhydrides and furans by interchanging medicament solutions; the secondary spray tower can treat alcohols, alkenes and naphthenes. The two absorption towers are provided with the same or different medicaments according to different high-temperature resin cracking components so as to realize effective absorption of cracked flue gas.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (11)
1. The casting flue gas treatment equipment is characterized by comprising a first absorption tower and a second absorption tower which are connected in series, and further comprising a medicament tank, wherein a medicament solution in the medicament tank is conveyed to the first absorption tower and the second absorption tower through a pump;
an atomizing nozzle is arranged at the upper part in the first absorption tower;
the second absorption tower comprises a plurality of layers of packing layers which are arranged at intervals, different spraying devices are correspondingly arranged on each layer of packing layer, and the different spraying devices respectively form non-vaporific water flow and water mist into the medicament solution; the casting flue gas is treated by the first absorption tower and the second absorption tower in sequence and then is emptied or enters a subsequent treatment device.
2. The casting flue gas treatment equipment according to claim 1, wherein a cyclone is provided at the bottom of the first absorption tower and/or the bottom of the second absorption tower.
3. The foundry flue gas treatment equipment of claim 1, wherein the spray device comprises a fire sprinkler head through which water is formed into an umbrella-shaped water flow layer, and a water mist nozzle through which a chemical solution is formed into a granular water mist or a fine water mist of 0.01-0.15 mm.
4. The casting flue gas treatment equipment according to claim 3, wherein the second absorption tower is provided with an air outlet at the upper part and an air inlet at the lower part, and the fire sprinkler is arranged above the uppermost packing of the second absorption tower.
5. The casting fume treatment apparatus of claim 3 wherein the water mist nozzles comprise spiral nozzles, solid cone nozzles.
6. The casting fume treatment apparatus of claim 5 wherein the spiral nozzle is disposed above the solid cone nozzle.
7. The casting fume treatment device according to claim 1, wherein the filler of the filler layer is selected from the group consisting of annular filler, spherical filler and water curtain filler.
8. The casting fume treatment device according to claim 1, wherein the filler of the filler layer is a water curtain filler.
9. The casting fume treatment device according to claim 1, wherein a plurality of the atomizing nozzles are arranged in the first absorption tower at intervals along the horizontal direction, and a plurality of the atomizing nozzles are arranged at intervals along the vertical direction, and the atomizing nozzles are high-pressure nozzles.
10. The casting fume treatment equipment according to claim 1, wherein the agent tank is provided in one or more, and the same or different agent tanks are connected to the first absorption tower and the second absorption tower through pipelines; a first liquid discharge port is formed in the bottom of the first absorption tower, and the medicine solution in the first absorption tower is conveyed to a second absorption tower or a medicine tank through the first liquid discharge port; and a second liquid outlet is formed in the bottom of the second absorption tower, and the medicine solution in the second absorption tower is conveyed to the medicine tank through the second liquid outlet.
11. The casting fume treatment apparatus according to claim 10, wherein a screen is provided in the agent tank, the screen separating the first/second drain port from the liquid inlet of the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121064950.2U CN214051026U (en) | 2021-05-18 | 2021-05-18 | Casting flue gas treatment facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121064950.2U CN214051026U (en) | 2021-05-18 | 2021-05-18 | Casting flue gas treatment facility |
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| Publication Number | Publication Date |
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| CN214051026U true CN214051026U (en) | 2021-08-27 |
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| CN202121064950.2U Active CN214051026U (en) | 2021-05-18 | 2021-05-18 | Casting flue gas treatment facility |
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| CN (1) | CN214051026U (en) |
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2021
- 2021-05-18 CN CN202121064950.2U patent/CN214051026U/en active Active
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