CN214598185U - Waste gas treatment device for landfill leachate treatment and submerged combustion - Google Patents
Waste gas treatment device for landfill leachate treatment and submerged combustion Download PDFInfo
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- CN214598185U CN214598185U CN202120540314.6U CN202120540314U CN214598185U CN 214598185 U CN214598185 U CN 214598185U CN 202120540314 U CN202120540314 U CN 202120540314U CN 214598185 U CN214598185 U CN 214598185U
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Abstract
The utility model belongs to the technical field of landfill leachate handles, a waste gas treatment device that landfill leachate handles submergence formula burning production is disclosed, include: the advanced oxidation spray tower is used for receiving the tail gas and carrying out oxidative decomposition on volatile organic compounds generated by the Maillard reaction in the tail gas; the biological filter is used for carrying out microbial decomposition treatment on the tail gas output from the biological enzyme spray tower; the demisting tower is used for carrying out white smoke removal treatment on the tail gas subjected to microbial decomposition treatment; and the induced draft fan is used for outputting the tail gas subjected to the white smoke removal treatment. The beneficial effects are as follows: 1. greatly improving the tail gas treatment effect and the purification efficiency. And the rapid discharge of tail gas. 2. The problem of standard discharge of malodorous pollutants and Volatile Organic Compounds (VOCS) in the immersed combustion tail gas of the landfill leachate treatment concentrated solution is solved; the problem that a great amount of white smoke is emitted by the garbage leachate concentrated solution treatment immersed combustion tail gas exhaust funnel is solved.
Description
Technical Field
The utility model belongs to the technical field of landfill leachate handles, especially, relate to a landfill leachate handles exhaust treatment device that submergence formula burning produced.
Background
At present, along with the construction of landfill and waste incineration plant projects, a large amount of landfill leachate is generated by waste treatment, the treatment of concentrated solution generated by the landfill leachate treatment is a difficult problem, the currently adopted concentrated solution immersed combustion or MVR treatment process is adopted, a large amount of malodorous pollutants, volatile organic matters, particulate matters and saturated water vapor white smoke are contained in the exhaust emission of waste gas and tail gas generated by the combustion of nanofiltration solution humic acid and ultrafiltration solution, particularly in Shenzhen, people are more and less, the landfill and the waste incineration plant are close to residences, the tail gas treatment is not good, the complaints of the residents around are caused, the negative effects are brought to the landfill leachate treatment projects, and the problem that the exhaust funnel disturbs the residents after reaching the standard must be solved at a high standard.
The existing landfill leachate treatment comprises the following steps:
for example, the publication number is CN105709577, the publication number is 2016, 6 and 29, and the name of the device is a complete device and a method for purifying the malodorous gas of the landfill leachate; it has a spray oxidation device and a centrifugal demisting device, and the tail gas is treated by two treatment devices. However, it is obvious that two treatment apparatuses can only realize two processes or two reactions, and the treatment effect and the purification efficiency are too low. Based on poor treatment effect, the problem of substandard emission still exists.
Therefore, the prior art is to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a landfill leachate handles exhaust treatment device that submergence formula burning produced, aims at solving the technical problem who mentions in the background art, effectively improves tail gas treatment effect, improves purification efficiency.
The utility model discloses a waste gas treatment device that landfill leachate handles submergence formula burning production, include:
the advanced oxidation spray tower is used for receiving the tail gas and carrying out oxidative decomposition on volatile organic compounds generated by the Maillard reaction in the tail gas;
the alkaline washing spray tower is used for carrying out neutralization reaction on the tail gas subjected to oxidative decomposition;
the biological enzyme spray tower is used for carrying out catalysis, phagocytosis and decomposition treatment on the tail gas subjected to the neutralization reaction and active substances in the biological enzyme;
the biological filter is used for carrying out microbial decomposition treatment on the tail gas output from the biological enzyme spray tower;
the demisting tower is used for carrying out white smoke removal treatment on the tail gas subjected to microbial decomposition treatment;
and the induced draft fan is used for outputting the tail gas subjected to the white smoke removal treatment.
Further, the advanced oxidation spray tower, the alkaline washing spray tower, the biological enzyme spray tower, the biological filter, the demisting tower and the induced draft fan are communicated in sequence.
Further, advanced oxidation spray column is including the first tower body that has first air inlet and first gas outlet, and first tower body is inside to be provided with first two layers of reaction packed beds, and first tower body is inside still to be provided with first spray set, and first spray set communicates with hydrogen peroxide solution charge device, ferrous sulfate charge device and sulphuric acid charge device respectively.
Further, the alkali washing spray tower comprises a second tower body with a second air inlet and a second air outlet, a second layer of reaction packed bed is arranged inside the second tower body, a second spray device is further arranged inside the second tower body, and the second spray device is communicated with the alkali liquor dosing device.
Further, biological enzyme spray column is including the third tower body that has third air inlet and third gas outlet, and the inside third second floor reaction packed bed that is equipped with of third tower body still is provided with third spray set inside the third tower body, and third spray set and biological enzyme charge device intercommunication.
Furthermore, the biological filter comprises a filter body with a fourth air inlet and a fourth air outlet, a two-pass microbial filter bed and a fourth spraying device are arranged in the filter body, and the fourth spraying device is communicated with the biological circulation water tank.
Furthermore, the defogging tower is provided with a fourth tower body with a fifth air inlet and a fifth air outlet, and a second-layer wire mesh defogging bed and a fifth spraying device are arranged in the fourth tower body.
And further, a fifth air outlet of the fourth tower body is communicated with the induced draft fan. The utility model discloses a landfill leachate handles exhaust treatment device that submerged combustion produced, beneficial effect as follows:
1. the tail gas is sequentially subjected to oxidation treatment, neutralization reaction, biological enzyme treatment, microbial decomposition and white smoke removal treatment, and the total 5 processes are adopted, so that various volatile substances in the tail gas are decomposed, and the tail gas treatment effect and the purification efficiency are greatly improved. And the last procedure realizes the quick discharge of the tail gas treated by the 5 procedures through a draught fan.
2. The problem of standard discharge of malodorous pollutants and Volatile Organic Compounds (VOCS) in the immersed combustion tail gas of the landfill leachate treatment concentrated solution is solved; the problem that a great amount of white smoke is emitted by the garbage leachate concentrated solution treatment immersed combustion tail gas exhaust funnel is solved.
Drawings
Fig. 1 is the structure schematic diagram of the waste gas treatment device for treating the submerged combustion of the landfill leachate.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It is noted that relative terms such as "first," "second," and the like may be used to describe various components, but these terms are not intended to limit the components. These terms are only used to distinguish one component from another component. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention. The term "and/or" refers to a combination of any one or more of the associated items and the descriptive items.
As shown in figure 1, the utility model discloses landfill leachate handles exhaust treatment device that submerged combustion produced comprises six parts altogether, specifically includes including senior oxidation spray column 1, alkali wash spray column 2, biological enzyme spray column 3, biological filter 4, defogging tower 5 and draught fan 6. Wherein the advanced oxidation spray tower, the alkaline washing spray tower, the biological enzyme spray tower, the biological filter, the demisting tower and the induced draft fan are communicated in sequence. Namely, the tail gas firstly enters the advanced oxidation spray tower 1, then reaches the alkaline washing spray tower 2, then reaches the biological enzyme spray tower 3, then reaches the biological filter 4, then reaches the demisting tower 5, and finally is discharged through the induced draft fan 6. I.e. six sections perform different functions on the exhaust gases.
Firstly, the advanced oxidation spray tower 1 is used for receiving tail gas and carrying out oxidative decomposition on volatile organic compounds generated by Maillard reaction in the tail gas; more specifically: the tail gas is firstly oxidized and decomposed by hydroxyl radicals in the advanced oxidation spray tower 1 to become micromolecular substances or CO2Or H2O, i.e., volatile organic compounds, are partially removed.
In order to realize the above oxidative decomposition treatment, the advanced oxidation spray tower 1 is designed to have a structure in which: the advanced oxidation spray tower comprises a first tower body with a first air inlet 14 for receiving tail gas, a first secondary reaction packed bed 11 is arranged in the first tower body, a first spray device 12 is also arranged in the first tower body, and the first spray device 12 is respectively communicated with a hydrogen peroxide dosing device 16, a ferrous sulfate dosing device 17 and a sulfuric acid dosing device 18 through a first circulating pump 13; wherein, the hydrogen peroxide dosing device 16 stores hydrogen peroxide, the ferrous sulfate dosing device 17 stores ferrous sulfate, and the sulfuric acid dosing device 18 stores sulfuric acid; the specific working principle is as follows: tail gas gets into in the first tower body through first air inlet 14, and first circulating pump 13 is used for transmitting hydrogen peroxide solution, ferrous sulfate, sulphuric acid to first spray set 12 in order to spray, and hydrogen peroxide solution, ferrous sulfate, sulphuric acid drop in first two layers of reaction packed bed 11 and carry out oxidation reaction with tail gas respectively. And the tail gas after the oxidation reaction is transmitted to the alkaline washing spray tower through the first air outlet 15.
Secondly, for the alkali washing spray tower 2, tail gas after oxidation reaction enters the alkali washing spray tower, acidic pollutants (sulfur dioxide, nitrogen oxide, hydrogen chloride and the like) in the waste gas are neutralized by alkaline matters to react into salt and H2O, etc., the contaminants are partially removed.
In order to realize the neutralization reaction, the structure of the alkaline washing spray tower 2 is designed as follows: the alkali washing spray tower comprises a second tower body with a second air inlet 24, a second layer of reaction packed bed 21 is arranged inside the second tower body, a second spray device 22 is further arranged inside the second tower body, and the second spray device 22 is connected with an alkali liquor dosing device 26 through a second circulating pump 23; wherein, the alkali liquor dosing device 26 stores alkaline matters; the specific working principle is as follows: the tail gas after the oxidation reaction reaches the second gas inlet 24 from the first gas outlet 15 and then reaches the second tower body, the second circulating pump 23 is used for conveying alkaline matters in the alkaline liquor dosing device 26 to the second spraying device 22 for spraying, and the alkaline matters and the tail gas are in full contact in the second-layer reaction packed bed 21, namely, a neutralization reaction (alkaline washing treatment) is carried out. And the tail gas after the neutralization reaction is transmitted to the biological enzyme spray tower 3 through a second gas outlet 25.
And secondly, for the biological enzyme spray tower 3, the waste gas after neutralization reaction enters the biological enzyme spray tower 3, volatile organic compounds generated by Maillard reaction in tail gas are catalyzed, phagocytized and decomposed by active substances in the biological enzyme, and the volatile organic compounds are partially removed.
In order to realize the catalysis, phagocytosis and decomposition treatment reaction of active substances in the biological enzyme, the structure of the biological enzyme spray tower 3 is designed as follows: the biological enzyme spray tower comprises a third tower body with a third air inlet 34, and a third second layer reaction packed bed 31 and a third spray device 32 are arranged in the third tower body; the third spraying device 32 is communicated with a biological enzyme dosing device 36 through a third circulating pump 33; wherein, the biological enzyme dosing device 36 stores biological enzyme; the specific working principle is as follows: the tail gas reaches a third gas inlet 34 from a second gas outlet 25 of the alkaline washing spray tower 2 to enter a third tower body; the third circulating pump 33 is used for conveying the biological enzyme to the third spraying device for spraying; the biological enzyme and the tail gas are subjected to biological enzyme reaction on the third second-layer reaction packed bed 31, namely volatile organic compounds generated by Maillard reaction in the tail gas are catalyzed, phagocytized and decomposed by active substances in the biological enzyme, and the volatile organic compounds are partially removed. And the tail gas after the microbial treatment is discharged through the third gas outlet 35.
Secondly, for the biological filter 4, the tail gas treated by the biological enzyme enters the biological filter 4, and pollutants in the tail gas are absorbed by microorganisms and metabolized into salt and CO2、H2O, and the like, and the pollutants are fundamentally removed.
In order to realize the microbial decomposition treatment, the structure of the biological filter 4 is designed as follows: the biological filter comprises a filter body with a fourth air inlet 42, a second return microbial filter bed 41 and a fourth spraying device 44 are arranged in the filter body, and the fourth spraying device 44 is communicated with a biological circulation water tank 46 through a fourth circulating pump 45; wherein the biological circulation water tank 46 stores microorganisms; the specific working principle is as follows: the tail gas reaches a fourth gas inlet 42 from a third gas outlet 35 of the biological enzyme spray tower 3 to enter the tank body, a fourth circulating pump 45 is used for transmitting microorganisms in a biological circulating water tank 46 to a fourth spraying device 44 for spraying, and then the microorganisms and the tail gas are subjected to microorganism decomposition treatment in a second return microbial filter bed 41; and the tail gas after the microbial decomposition treatment is discharged through the fourth gas outlet 43.
Secondly, for the defogging tower 5, the tail gas after the microbial treatment enters the defogging tower 5, and the white smoke in the tail gas is removed by the wire mesh defogger.
In order to realize the white smoke removal, the structure of the demisting tower 5 is designed as follows: the demisting tower is provided with a fourth tower body with a fifth air inlet 54, and the fourth tower body is provided with a two-layer wire mesh demisting bed 51 and a fifth spraying device 52; the fifth spraying device 52 is connected with a fifth circulating pump 53; the specific working principle is as follows: the tail gas reaches the fifth gas inlet 54 from the fourth gas outlet 43 of the biological filter 4 to reach the fourth tower body, and saturated water vapor in the tail gas is removed through the two-layer wire mesh demisting bed 51; and finally, the tail gas is discharged to the induced draft fan from a fifth gas outlet 55 of the demisting tower 5, and the tail gas discharge efficiency is improved through the induced draft fan.
The utility model discloses a landfill leachate handles exhaust treatment device that submerged combustion produced, this processing apparatus's processing method includes following step:
step 1: the tail gas firstly enters the advanced oxidation spray tower 1, volatile organic compounds generated by Maillard reaction in the tail gas are oxidized and decomposed by hydroxyl radicals to become small molecular substances or CO2 or H2O, and the volatile organic compounds are partially removed;
step 2: the tail gas after advanced oxidation treatment enters an alkaline washing spray tower 2, acidic pollutants (sulfur dioxide, nitrogen oxides, hydrogen chloride and the like) in the waste gas are neutralized by alkaline matters to react into salt, H2O and the like, and the pollutants are partially removed;
and 3, step 3: the waste gas after the alkali washing treatment enters a biological enzyme spray tower 3, volatile organic compounds generated by Maillard reaction in the tail gas are catalyzed, phagocytized and decomposed by active substances in biological enzyme, and the volatile organic compounds are partially removed;
and 4, step 4: the tail gas treated by the biological enzyme enters a biological filter 4, pollutants in the tail gas are absorbed by microorganisms and metabolized into salts, CO2, H2O and the like, and the pollutants are fundamentally removed;
and 5, step 5: the tail gas after biological treatment enters a demisting tower 5, and white smoke in the tail gas is removed by a wire mesh demister;
and 6, step 6: and the induced draft fan receives and discharges the tail gas transmitted from the demisting tower 5.
Specifically, the method comprises the following steps: in the step 1, Fenton reaction is adopted for advanced oxidation, hydrogen peroxide, ferrous sulfate and sulfuric acid are adopted as reagents, and the pH value of the circulating liquid is 4-5;
in the step 2, alkali-base neutralization reaction is adopted in alkali washing, and sodium hydroxide is adopted as a medicament;
in the step 3, the biological enzyme is sprayed with high-efficiency catalytic active substances of the biological enzyme, and pollutants are removed through biological enzyme catalysis, phagocytosis, decomposition treatment and the like;
in the step 4, the biological filter tank adopts a microorganism biofilm formation for deodorization to form a microorganism filter bed for absorbing and adsorbing pollutants, and the microorganisms metabolize the pollutants into salts and CO2、H2O, and the like.
And in the step 5, a wire mesh demisting bed is adopted in the demisting tower to remove saturated water vapor in the tail gas.
The residence time of the tail gas in the advanced oxidation spray tower, the alkaline washing spray tower and the biological enzyme spray tower in the treatment device is respectively 6 seconds to 8 seconds, and the residence time of the tail gas in the microbial filter bed of the biological filter is 15 seconds to 20 seconds.
The utility model discloses a landfill leachate handles exhaust treatment device and method that submerged combustion produced, processing technology adopt senior oxidation to spray + alkali wash sprays + bio-enzyme sprays + biological filter deodorization + defogging tower, and the exhaust emission reaches foul smell concentration and is not more than 309 (dimensionless) after the processing, and the aiutage does not emit white smoke.
The utility model is applied to three plants for treating landfill leachate in Shenzhen lower terrace landfill; the exhausted tail gas can not cause pollution to surrounding residential areas, and white smoke can not be generated.
The utility model has the advantages that: the tail gas is sequentially subjected to oxidation treatment, neutralization reaction, biological enzyme treatment, microbial decomposition and white smoke removal treatment, and the total 5 processes are adopted, so that various volatile substances in the tail gas are decomposed, and the tail gas treatment effect and the purification efficiency are greatly improved. And the last procedure realizes the quick discharge of the tail gas treated by the 5 procedures through a draught fan. The problem of standard discharge of malodorous pollutants and Volatile Organic Compounds (VOCS) in the immersed combustion tail gas of the landfill leachate treatment concentrated solution is solved; the problem that a great amount of white smoke is emitted by the garbage leachate concentrated solution treatment immersed combustion tail gas exhaust funnel is solved.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. The utility model provides a landfill leachate handles exhaust treatment device that submerged combustion produced which characterized in that includes:
the advanced oxidation spray tower is used for receiving the tail gas and carrying out oxidative decomposition on volatile organic compounds generated by the Maillard reaction in the tail gas;
the alkaline washing spray tower is used for carrying out neutralization reaction on the tail gas subjected to oxidative decomposition;
the biological enzyme spray tower is used for carrying out catalysis, phagocytosis and decomposition treatment on the tail gas subjected to the neutralization reaction and active substances in the biological enzyme;
the biological filter is used for carrying out microbial decomposition treatment on the tail gas output from the biological enzyme spray tower;
the demisting tower is used for carrying out white smoke removal treatment on the tail gas subjected to microbial decomposition treatment;
and the induced draft fan is used for outputting the tail gas subjected to the white smoke removal treatment.
2. The landfill leachate treatment submerged combustion generated waste gas treatment device as claimed in claim 1, wherein the advanced oxidation spray tower, the alkaline cleaning spray tower, the biological enzyme spray tower, the biological filter, the demister tower and the induced draft fan are communicated in sequence.
3. The landfill leachate treatment submerged combustion generated waste gas treatment device as claimed in claim 2, wherein the advanced oxidation spray tower comprises a first tower body with a first gas inlet and a first gas outlet, a first and second reaction packed bed is arranged inside the first tower body, a first spray device is further arranged inside the first tower body, and the first spray device is respectively communicated with a hydrogen peroxide dosing device, a ferrous sulfate dosing device and a sulfuric acid dosing device.
4. The landfill leachate treatment submerged combustion generated waste gas treatment device as claimed in claim 2, wherein the alkaline washing spray tower comprises a second tower body with a second gas inlet and a second gas outlet, a second layer of reaction packed bed is arranged inside the second tower body, and a second spray device is further arranged inside the second tower body and is communicated with the alkali liquor dosing device.
5. The landfill leachate treatment submerged combustion generated waste gas treatment device as claimed in claim 2, wherein the biological enzyme spray tower comprises a third tower body with a third gas inlet and a third gas outlet, a third second layer of reaction packed bed is arranged inside the third tower body, a third spray device is further arranged inside the third tower body, and the third spray device is communicated with the biological enzyme dosing device.
6. The landfill leachate treatment submerged combustion generated waste gas treatment device as claimed in claim 2, wherein the biological filter comprises a tank body with a fourth gas inlet and a fourth gas outlet, a two-pass microbial filter bed and a fourth spraying device are arranged in the tank body, and the fourth spraying device is communicated with the biological circulation water tank.
7. The apparatus as claimed in claim 2, wherein the demister tower has a fourth tower body with a fifth gas inlet and a fifth gas outlet, and the fourth tower body is provided with two wire mesh demisting beds and a fifth spray device.
8. The landfill leachate treatment submerged combustion generated waste gas treatment device as claimed in claim 7, wherein the fifth gas outlet of the fourth tower body is communicated with an induced draft fan.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053864A (en) * | 2021-12-15 | 2022-02-18 | 青岛万慧源环保科技有限公司 | Treatment method of waste gas containing organic pollutants |
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- 2021-03-16 CN CN202120540314.6U patent/CN214598185U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053864A (en) * | 2021-12-15 | 2022-02-18 | 青岛万慧源环保科技有限公司 | Treatment method of waste gas containing organic pollutants |
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