CN215742853U - Waste gas purification device - Google Patents
Waste gas purification device Download PDFInfo
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- CN215742853U CN215742853U CN202122058164.8U CN202122058164U CN215742853U CN 215742853 U CN215742853 U CN 215742853U CN 202122058164 U CN202122058164 U CN 202122058164U CN 215742853 U CN215742853 U CN 215742853U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a waste gas purification device, and belongs to the technical field of waste gas treatment. The purification device comprises a prewashing tank and a biological filter which are communicated, wherein the prewashing tank and the biological filter are of a closed box structure, an air inlet is formed in the prewashing tank and connected with an external waste gas source, an air outlet is formed in the biological filter, a circulating water tank is arranged at the common bottom of the prewashing tank and the biological filter, the circulating water tank, the prewashing tank and the biological filter are of an integral structure, a steam heat exchange device is arranged in the circulating water tank, a steam inlet of the steam heat exchange device is connected with an external steam source, and a steam outlet of the steam heat exchange device is arranged in water.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to a waste gas purification device.
Background
Waste (such as livestock and poultry manure, excess sludge of sewage treatment plants, garbage in garbage transfer and distribution stations and the like) often releases a large amount of waste gas with peculiar smell in the processes of production, stacking and discharge, and the waste gas contains a large amount of hydrogen sulfide and ammonia gas, so that if the waste gas is directly discharged into the air, the air is polluted, people feel uncomfortable, and the ecological environment is damaged. For the treatment of the above waste gas, biological methods are one of the most economical and effective treatment means, and the most important form is biological filters. The biological filter can treat waste gas with large flow rate and short retention time of the waste gas in the biological filter, so that the biological filter can degrade a large amount of pollutants in a short time, and the biological filter is an ideal waste gas treatment device.
The prior art (CN206746308U) discloses a waste gas deodorization purifier, including the prewashing pond, the biological filter that communicates with the prewashing pond, the biological filter is airtight box structure, the prewashing pond is equipped with the air inlet, the air inlet is connected with the waste gas source, the biological filter is equipped with the gas vent, the prewashing pond, the top of biological filter is equipped with the shower head, the shower head passes through the water pump and is connected with outside water source, be equipped with the biofilter bed of individual layer biofilm carrier in the biological filter, the biofilter bed sets up between prewashing pond and gas vent, it has the microorganism that is used for carrying out biochemical reaction with waste gas to inoculate on the biofilm carrier. This prior art can effectually get rid of the easily soluble waste gas pollutant in water through washing the humidification with waste gas in advance to can make in the waste gas large granule dust deposit, thereby reduce biological filter's pollution load, improved waste gas deodorization purifier's waste gas foul substance greatly and got rid of, thereby effectual purification waste gas, the running cost is low, no secondary pollution produces, purifying effect is good, the environmental protection. However, the temperature of the water in the water storage tank in the prior art is controlled by a heating device in the water storage tank to heat the water, so that potential safety hazards exist; and the heating device is easy to be damaged, and the maintenance is also troublesome once problems occur.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an exhaust gas purifying apparatus, which maintains the temperature of water in a circulating water tank through a steam heat exchange device, and solves the technical problems of easy damage and potential safety hazard in the prior art that water is heated by a heating device.
In order to achieve the technical purpose, the technical scheme of the utility model provides an exhaust gas purification device, which comprises a prewashing tank and a biological filter tank which are communicated, wherein the prewashing tank and the biological filter tank are of a closed box structure, the prewashing tank is provided with an air inlet, the air inlet is connected with an external exhaust gas source, the biological filter tank is provided with an air outlet, the common bottom of the prewashing tank and the biological filter tank is provided with a circulating water tank, the prewashing tank and the biological filter tank are of an integral structure, a steam heat exchange device is arranged in the circulating water tank, a steam inlet of the steam heat exchange device is connected with an external steam source, a steam outlet of the steam heat exchange device is arranged in water and used for transferring the heat of the steam into the water, the circulating water tank is connected with a plurality of spray heads through a circulating pipe and a circulating pump, and the spray heads are arranged at the tops of the prewashing tank and the biological filter tank, and is detachably connected with the circulating water pipe.
One of the advantageous features of the above technical solution is that the steam heat exchange device is a multi-turn disc-shaped structure formed by winding capillary heat exchange tubes, one end pipe orifice of each capillary heat exchange tube is connected with an external steam source, and the other end pipe orifice of each capillary heat exchange tube is arranged in water, so that heat of steam is transferred into water through the capillary heat exchange tubes to maintain the temperature of the water.
The second advantageous feature of the above technical solution is that each spray header is provided with a flange interface, through which the spray header is detachably connected to the circulating water pipe, so as to achieve the purpose of flexibly and quickly mounting and dismounting the spray header as required.
Furthermore, a prewashing bed formed by washing fillers is arranged in the prewashing tank, the prewashing bed is arranged between the air inlet and the biological filter, and the washing fillers are D50 polyhedral ball fillers.
The biological filter is characterized in that a biological filter bed formed by biological fillers is arranged in the biological filter tank, the biological filter bed is arranged between the air outlet and the prewashing tank, the biological fillers are D50 multi-surface ball fillers, and microorganisms for biochemical reaction with waste gas are inoculated on the biological fillers.
Furthermore, a plurality of air outlets are arranged, and each air outlet is provided with a demisting device for removing water mist in the purified tail gas to be discharged; the demisting device is a steam-water separator, two layers of rotational flow plates are arranged in the steam-water separator, and multi-surface ball fillers are filled between the two layers of rotational flow plates.
Further, the purification device further comprises a temperature detection device, a pressure detection device and a PH detection probe, which are respectively used for detecting the temperature of the biological filter bed, the air pressure difference above and below the biological filter bed and the PH value of the biological filter bed.
In addition, it should be noted that, the above technical scheme is suitable for the situation that the concentration of hydrogen sulfide and ammonia in the waste gas is relatively large, and when the concentration of hydrogen sulfide and ammonia in the waste gas is relatively small, the waste gas source can be directly connected to the circulation water tank, specifically, a plurality of air inlet branch pipes are arranged on the circulation water tank, one ends of the plurality of air inlet branch pipes are connected to the same air inlet main pipe, the air inlet main pipe is connected with an external waste gas source, then an air distribution pipe is arranged at the other end of each air inlet branch pipe, the other end of the air distribution pipe is provided with a plug, an air distribution pipe opening for exhausting is arranged at the top of the air distribution pipe, and the waste gas directly enters the biological filter to perform chemical reaction with microorganisms to be purified through the air distribution pipe. Therefore, the waste gas purification device can flexibly select to be unnecessary to be prewashed according to the concentration of pollutants in the waste gas, is close to the actual situation, and has strong practicability.
Compared with the prior art, the utility model has the beneficial effects that:
according to the waste gas purification device provided by the utility model, the steam heat exchange device is arranged in the circulating water tank, the steam inlet of the steam heat exchange device is connected with an external steam source, and the steam outlet of the steam heat exchange device is arranged in the water in the circulating water tank, so that the heat of the steam can be transferred into the water, and the water in the circulating water tank is further heated, and the temperature of the biofilter bed is kept; on the basis, the problems that the heater is easy to damage and troublesome to maintain due to the fact that the heater is used for heating water in the circulating water tank are avoided, and the normal and effective operation of the whole purifying device is guaranteed.
Drawings
Fig. 1 is a schematic view of the overall construction of an exhaust gas purifying apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of a steam heat exchange device of the present invention;
FIG. 3 is a schematic diagram of the steam-water separator of the present invention;
FIG. 4 is a perspective view of the gas distribution tube of the present invention;
fig. 5 is a front view of the gas distribution pipe of the present invention.
Shown in the figure:
1-a prewashing tank, 2-a biological filter, 3-a circulating water tank, 4-an air inlet pipe, 5-an air outlet branch pipe, 6-an air outlet main pipe, 7-a steam heat exchange device, 7.1-a steam inlet, 7.2-a steam outlet, 8-a circulating water pipe, 9-a circulating pump, 10-a spray header, 11-a prewashing bed, 12-a biological filter bed, 13-a filler supporting plate, 14-a partition plate, 15-a demisting device, 15.1-a rotational flow plate, 16-a temperature detection device, 17-a pressure detection device, 18-a PH detection probe, 19-an air inlet branch pipe, 20-an air inlet main pipe, 21-an air distribution pipe, 22-a plug, 23-an air distribution pipe orifice and 24-a fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1, the present embodiment relates to an exhaust gas purification device, the purification device comprises a prewashing tank 1 and a biological filter 2 which are communicated with each other, the prewashing tank 1 and the biological filter 2 are of a closed box structure, an air inlet is arranged at the top of the prewashing tank 1, the air inlet is connected with an external exhaust gas source through an air inlet pipe 4, an air outlet is arranged above the biological filter 2, a circulating water tank 3 is arranged at the common bottom of the prewashing tank 1 and the biological filter 2, the circulating water tank 3, the prewashing tank 1 and the biological filter 2 are of an integral structure, a steam heat exchange device 7 is arranged in the circulating water tank 3, a steam inlet of the steam heat exchange device 7 is connected with an external steam source, a steam outlet of the steam heat exchange device 7 is arranged in water and used for transferring heat of steam into the water, the circulating water tank 3 is connected with a plurality of spray headers 10 through a circulating water pipe 8 and a circulating pump 9, the plurality of spray headers 10 are arranged at the tops of the pre-washing tank 1 and the biological filter 2 and detachably connected with the circulating water pipe 8.
In the embodiment, waste gas sequentially passes through a prewashing tank 1 and a biological filter tank 2, the top of which is provided with a spray header 10, D50 polyhedral ball fillers are arranged in the prewashing tank 1 and the biological filter tank 2, microorganisms for biochemical reaction with the waste gas are inoculated on the fillers of the biological filter tank 2, and when the waste gas passes through the prewashing tank 1, the spray header 10 at the top of the prewashing tank 1 sprays water on the waste gas, so that large-particle dust in the waste gas and water-soluble pollution components in the waste gas, such as hydrogen sulfide, ammonia gas and the like, can be effectively removed, the pollution load of the biological filter tank 2 is reduced, and meanwhile, the waste gas is humidified, so that the treatment efficiency of the biological filter tank 2 is improved; the waste gas humidified by the pre-washing tank 1 enters the biological filter 2 to react with microorganisms in the biological filter 2, and the waste gas is decomposed and absorbed by the microorganisms, so that the aim of purifying the waste gas is fulfilled, secondary pollution is avoided, the purification effect is good, and the environment is protected.
Specifically, in the practical application of the present embodiment, the prewashing tank 1 and the biological filter 2 are arranged side by side, the interior of the closed tank structure is divided into two chambers by a partition 14, one chamber is used as the prewashing tank 1, the other chamber is used as the biological filter 2, and two rows of spray headers 10 are arranged above the two chambers; a certain space is reserved between the bottom of the partition plate 14 and the bottom of the box body to serve as a circulating water tank 3, and a steam heat exchange device 7 is arranged in the circulating water tank 3.
Further, as shown in fig. 2, the steam heat exchange device 7 is a multi-circle disc-shaped structure formed by winding capillary heat exchange tubes, one end pipe orifice of each capillary heat exchange tube is used as a steam inlet 7.1 to be connected with an external steam source, and the other end pipe orifice of each capillary heat exchange tube is used as a steam outlet 7.2 to be arranged in water, so that heat of steam can be transferred into the water to increase the temperature of the water. Meanwhile, the purification device further comprises a temperature detection device 16, a pressure detection device 17 and a PH detection probe 18, which are respectively used for detecting the temperature of the biological filter bed 12, the air pressure difference above and below the biological filter bed 12 and the PH value of the biological filter bed 12. When the temperature detection device 16 detects that the temperature of the biofilter 12 is too low, an automatic valve on an external steam source device for supplying steam can be controlled to be opened for steam input, and water is heated through the capillary heat exchange tube, so that the temperature is kept constant in a range suitable for production and propagation of microorganisms. Further preferably, the temperature of the biofilter bed 12 of this embodiment is preferably maintained at about 26 to 45 deg.C, most preferably about 35 deg.C, since most of the deodorizing microorganisms will survive at a temperature of 10 to 50 deg.C and will have a reduced biological activity at temperatures below 10 deg.C or above 50 deg.C. In addition, the pH of the biofilter 12 also affects the biological activity of the microorganisms, and the main effect is to cause the change of cell charge, thereby affecting the absorption of nutrients by the microorganisms, affecting the activity of enzymes in the metabolic process, and changing the toxicity of nutrients and harmful substances in the growing environment, in this embodiment, the pH of the biofilter 12 is preferably 6-8.
Specifically, in this embodiment, water in the circulation water tank 3 is sprayed to the prewashing tank 1 and the biological filter 2 through the spray header 10 by the circulation water pipe 8 under the action of the circulation pump 9, and the water is sprayed to the prewashing tank 1 to firstly prewash and remove water-soluble substances in the waste gas, and secondly humidify the waste gas, and generally continuous circulation spraying or intermittent spraying can be adopted; the spraying to the biological filter 2 is usually performed by intermittent spraying, because microorganisms in the biological filter 2 lose activity if the biological filter is in a dry state, and the air flow is blocked because the water film on the surface of the carrier is thickened and the pressure loss of ventilation is increased if the humidity is too high, so that the humidification degree should be considered comprehensively to maintain the activity of the microorganisms and the air dissolving contact efficiency. The spraying amount of the biofilter 2 in this embodiment is determined according to the water content of the biofilter 2, and the purpose is to control the water content of the biofilter 12 of the biofilter 2 to 40-60% to facilitate the growth of microorganisms, thereby maintaining high biochemical degradation activity. Furthermore, the spray header 10 is detachably connected to the circulating water pipe 8 through a flange interface, and the detachable connection facilitates the installation and the detachment of the spray header 10, so that the number of the spray headers can be flexibly selected according to the change of the spray amount in practical application. In this embodiment, the spray headers 10 are arranged in two rows at the tops of the pre-washing tank 1 and the biological filter tank 2.
Specifically, a prewashing bed 11 formed by washing filler is arranged in the prewashing pool 1, the prewashing bed 11 is arranged between the air inlet and the biological filter 2, and the washing filler is D50 polyhedral ball filler; a biological filter bed 12 formed by biological fillers is arranged in the biological filter 2, the biological filter bed 12 is arranged between the air outlet and the prewashing tank 1, the biological fillers are D50 polyhedral ball fillers, and microorganisms for biochemical reaction with waste gas are inoculated on the biological fillers. In the embodiment, the D50 polyhedral spherical hollow ball is used as the filler, the specific surface area of the filler with the structure is large, the contact area between gas and liquid can be increased, and the adsorption is facilitated.
Furthermore, the prewashing bed 11 and the biological filter bed 12 are arranged on a filler support plate 13, the filler support plate 13 is respectively fixed in the prewashing tank 1 and the biological filter tank 2, the filler support plate 13 is preferably a glass fiber reinforced plastic grid plate, and the glass fiber reinforced plastic grid plate is provided with a plurality of regularly distributed rectangular and square blank plates, has bidirectional and isotropic mechanical characteristics, and has larger regularly distributed rectangular aperture, so that the gas flow is not influenced.
Specifically, in this embodiment, the air outlet of the biological filter 2 is provided with a plurality of air outlets, the air outlet is connected with an air outlet branch pipe 5, the air outlet branch pipes 5 are connected to an air outlet main pipe 6, and the air outlet main pipe 6 is provided with a fan 24. In order to prevent the air from carrying water mist when the purified exhaust gas is discharged into the air, a demisting device 15 is arranged at each air outlet. Preferably, the demister 15 is a steam-water separator, and the structure thereof is shown in fig. 3,
two layers of rotational flow plates 15.1 are arranged in the steam-water separator, and multi-surface ball fillers are filled between the two layers of rotational flow plates 15.1, so that the separation effect can be further improved.
It should be noted that the exhaust gas purification device according to the above embodiment is suitable for the case where the concentration of the pollutants in the exhaust gas is high, specifically, when the concentration of the hydrogen sulfide in the exhaust gas is greater than 600mg/m3The concentration of ammonia is more than 300mg/m3When in use, an exhaust gas source is connected with an air inlet of the pre-washing tank 1, and exhaust gas is pre-washed and then enters the biological filter 2 for biochemical reaction; and when the concentrations of hydrogen sulfide and ammonia in the exhaust gas are small (the concentration of hydrogen sulfide is less than 600 mg/m)3The concentration of ammonia is less than 300mg/m3) The waste gas source can be directly connected with the circulating water tank 3, and the waste gas is directly introduced into the biological filter 2 for reaction without pre-washing treatment. The scheme specifically comprises the following steps: the circulating water tank 3 is provided with a plurality of air inlet branch pipes 19, one ends of the air inlet branch pipes 19 are connected to the same air inlet main pipe 20, and the air inlet main pipe 20 is connected with an external waste gas source.
Furthermore, the other end of each air inlet branch pipe 19 is provided with an air distribution pipe 21, the structure of the air distribution pipe 21 is shown in fig. 4-5, the other end of the air distribution pipe 21 is provided with a plug 22, the top of the air distribution pipe 21 is provided with an air distribution pipe opening 23 for exhausting, waste gas enters the air distribution pipe 21 through the air inlet branch pipes 19, and then the waste gas is subjected to countercurrent air distribution in the biological filter 2 through the air distribution pipe openings 23, so that the uniformity of air distribution can be improved, short flow is reduced, and the treatment efficiency is improved.
In summary, the working principle of the exhaust gas purifying device provided by the embodiment is as follows: when the concentration of hydrogen sulfide in the exhaust gas is more than 600mg/m3The concentration of ammonia is more than 300mg/m3When in use, the waste gas source is connected with the gas inlet of the pre-washing tank 1, the waste gas enters the pre-washing tank 1, the waste gas pollutants which are easy to dissolve in water, such as hydrogen sulfide, ammonia gas and the like, can be effectively removed under the washing action of the spray header 10, and large particles in the waste gas can be enabled to be largeThe dust is precipitated, so that the pollution load of the biological filter is reduced, the pollutant removal rate of the purification device is improved, and the purification effect is good; the pre-washed waste gas enters the biological filter 2 to carry out biochemical reaction with microorganisms, the waste gas can be thoroughly purified, and the purified gas is discharged into the atmosphere through the gas outlet. In the process, the microorganisms in the biofilter 2 can grow on the organic substances in the biological filler without adding a nutrient. When the concentration of hydrogen sulfide in the exhaust gas is less than 600mg/m3The concentration of ammonia is less than 300mg/m3When in use, the waste gas source is connected with the main gas inlet pipe 20 on the circulating water tank 3, the waste gas directly enters the biological filter 2 for biochemical reaction without prewashing, and the reaction process of the waste gas and the microorganisms is the same as the above.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A waste gas purification device comprises a pre-washing tank and a biological filter which are communicated, wherein the pre-washing tank and the biological filter are of a closed box structure, an air inlet is arranged on the pre-washing tank, the air inlet is connected with an external waste gas source, and an air outlet is arranged on the biological filter, the waste gas purification device is characterized in that a circulating water tank is arranged at the common bottom of the pre-washing tank and the biological filter, the circulating water tank and the pre-washing tank and the biological filter are of an integrated structure, a steam heat exchange device is arranged in the circulating water tank, a steam inlet of the steam heat exchange device is connected with an external steam source, a steam outlet of the steam heat exchange device is arranged in the water and is used for transferring the heat of the steam into the water, the circulating water tank is connected with a plurality of spray headers through a circulating pipe and a circulating pump, and the spray headers are arranged at the tops of the pre-washing tank and the biological filter, and is detachably connected with the circulating water pipe.
2. An exhaust gas purification apparatus as claimed in claim 1, wherein said vapor heat exchange means is a multi-turn disc-like structure formed by winding a capillary heat exchange tube.
3. An exhaust gas purification apparatus as set forth in claim 2, wherein each of said shower heads is provided with a flange joint through which the shower head is detachably connected to said circulating water pipe.
4. An exhaust gas purification apparatus as claimed in claim 1, wherein a prewash bed formed by washing filler is disposed in the prewash tank, the prewash bed is disposed between the air inlet and the biological filter, and the washing filler is D50 multi-surface ball filler.
5. The exhaust gas purification apparatus according to claim 1, wherein a biofilter bed formed by a biofilm carrier is arranged in the biofilter, the biofilter bed is arranged between the air outlet and the prewashing tank, the biofilm carrier is D50 polyhedral ball packing, and microorganisms for biochemical reaction with the exhaust gas are inoculated on the biofilm carrier.
6. An exhaust gas purifying apparatus as claimed in claim 1, wherein a plurality of air outlets are provided, and a defogging device is provided at each air outlet for removing water mist from the purified exhaust gas to be discharged.
7. The exhaust gas purification device according to claim 6, wherein the demister is a steam-water separator, two layers of rotational flow plates are arranged in the steam-water separator, and a multi-surface ball filler is filled between the two layers of rotational flow plates.
8. The exhaust gas purifying apparatus according to claim 5, further comprising a temperature detecting device, a pressure detecting device and a pH detecting probe for detecting a temperature of the bio-filter bed, a difference in air pressure above and below the bio-filter bed and a pH value of the bio-filter bed, respectively.
9. An exhaust gas purifying apparatus as claimed in any one of claims 1 to 8, wherein a plurality of intake branch pipes are provided in said circulation tank, one ends of said plurality of intake branch pipes are connected to a same intake main pipe, and said intake main pipe is connected to an external exhaust gas source.
10. An exhaust gas purification apparatus as claimed in claim 9, wherein a gas distribution pipe is provided at the other end of each of the gas inlet branch pipes, a plug is provided at the other end of the gas distribution pipe, and a gas distribution pipe opening for discharging gas is provided at the top of the gas distribution pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122058164.8U CN215742853U (en) | 2021-08-27 | 2021-08-27 | Waste gas purification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122058164.8U CN215742853U (en) | 2021-08-27 | 2021-08-27 | Waste gas purification device |
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| CN215742853U true CN215742853U (en) | 2022-02-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115477384A (en) * | 2022-10-25 | 2022-12-16 | 和县伊迈炭业有限责任公司 | Heat exchange type biological filter with adjustable microorganism growth temperature and method thereof |
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2021
- 2021-08-27 CN CN202122058164.8U patent/CN215742853U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115477384A (en) * | 2022-10-25 | 2022-12-16 | 和县伊迈炭业有限责任公司 | Heat exchange type biological filter with adjustable microorganism growth temperature and method thereof |
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