CN108057337B - Two-section layered rear-mounted induced air ring energy type deodorizing system and deodorizing process - Google Patents
Two-section layered rear-mounted induced air ring energy type deodorizing system and deodorizing process Download PDFInfo
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- 238000004332 deodorization Methods 0.000 claims description 21
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention provides a two-section layered rear-mounted induced air annular energy type deodorizing system and deodorizing technology, wherein the system comprises a pretreatment section and a biological section; the pretreatment section sequentially comprises a first circulating mixed liquid upper layer release unit, a first upper layer filling area, a first circulating mixed liquid lower layer release unit, a first lower layer filling area and a first built-in storage unit from top to bottom; the biological section sequentially comprises a second circulating mixed liquid upper layer releasing unit, a second upper layer filling area, a second circulating mixed liquid lower layer releasing unit, a second lower layer filling area and a second built-in storage unit from top to bottom. The invention not only can realize the efficient removal of odor, but also can realize flexible scheduling of process operation, simple and convenient management and maintenance, relatively saving investment energy consumption, reliable and stable treatment effect, and fully exert the suitability, economy and sustainability thereof.
Description
Technical Field
The invention relates to the field of odor treatment, in particular to a two-stage layered rear-mounted induced air annular energy type deodorizing system and deodorizing technology.
Background
With the development of cities and the acceleration of industrialization, the application area of sewage treatment facilities is wider and wider, and the subsequent malodorous gas pollution has become a hot spot environmental problem which is of great concern to people. A large amount of malodorous gas such as hydrogen sulfide, ammonia or other sulfur-containing gas can cause toxicity to human respiratory, digestive, cardiovascular, endocrine and nervous systems to different extent, and even easily cause abnormal cancer.
The traditional deodorization technology has low purification efficiency, high energy consumption and treatment cost, is easy to cause secondary pollution, is restricted by weather and other conditions, and limits the application range. Therefore, development of deodorization technology must be enhanced, and the level of deodorization is continuously increased.
The invention provides the two-section layered rear-mounted induced air annular energy type deodorizing system and the deodorizing process, which not only can realize the efficient removal of odor, but also can realize flexible scheduling of process operation, simple and convenient management and maintenance, relatively saving investment energy consumption, reliable and stable treatment effect, and fully exert the suitability, economy and sustainability thereof.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a two-stage layered rear-mounted induced-air ring-energy-type deodorizing system and deodorizing process, the system comprising a pretreatment stage and a biological stage; the pretreatment section sequentially comprises a first circulating mixed liquid upper layer release unit, a first upper layer filling area, a first circulating mixed liquid lower layer release unit, a first lower layer filling area and a first built-in storage unit from top to bottom; the biological section sequentially comprises a second circulating mixed liquid upper layer releasing unit, a second upper layer filling area, a second circulating mixed liquid lower layer releasing unit, a second lower layer filling area and a second built-in storage unit from top to bottom. The invention not only can realize the efficient removal of odor, but also can realize flexible scheduling of process operation, simple and convenient management and maintenance, relatively saving investment energy consumption, reliable and stable treatment effect, and fully exert the suitability, economy and sustainability thereof.
The first aspect of the invention provides a two-section layered rear-mounted induced air annular energy type deodorizing system, which comprises a pretreatment section and a biological section;
the pretreatment section sequentially comprises a first circulating mixed liquid upper layer release unit, a first upper layer filling area, a first circulating mixed liquid lower layer release unit, a first lower layer filling area and a first built-in storage unit from top to bottom; the pretreatment section further comprises a first circulating mixed liquor replenishing pipeline, a first circulating mixed liquor upper-layer circulating pipeline and a first circulating mixed liquor lower-layer circulating pipeline; the external mixed liquid is communicated with the first built-in storage unit through the first circulating mixed liquid replenishing pipeline; the first built-in storage unit is communicated with the first circulating mixed liquid upper layer release unit through the first circulating mixed liquid upper layer circulating pipeline, and is communicated with the first circulating mixed liquid lower layer release unit through the first circulating mixed liquid lower layer circulating pipeline; the pretreatment section further comprises a ventilation gallery, a pretreatment section gas outlet is arranged above the first circulating mixed liquid upper layer release unit, and the pretreatment section gas outlet is communicated with the biological section through the ventilation gallery;
the biological section sequentially comprises a second circulating mixed liquid upper layer releasing unit, a second upper layer filling area, a second circulating mixed liquid lower layer releasing unit, a second lower layer filling area and a second built-in storage unit from top to bottom; the biological section also comprises a second circulating mixed liquor replenishing pipeline, a second circulating mixed liquor upper circulating pipeline and a second circulating mixed liquor lower circulating pipeline; the external mixed liquid is communicated with the second built-in storage unit through the second circulating mixed liquid replenishing pipeline; the second built-in storage unit is communicated with the second circulation mixed liquid upper layer release unit through the second circulation mixed liquid upper layer circulation pipeline, and is communicated with the second circulation mixed liquid lower layer release unit through the second circulation mixed liquid lower layer circulation pipeline.
Preferably, the method further comprises at least one of the following technical characteristics:
1) The deodorizing system further comprises an odor collecting pipeline, and malodorous gas is introduced into the pretreatment section through the odor collecting pipeline;
2) The pretreatment section further comprises a malodorous gas inlet which is arranged at the lower part of the pretreatment section and above the first built-in storage unit;
3) The pretreatment section gas outlet is arranged at the lower part of the biological section and above the second built-in storage unit;
4) The packing in the first upper packing zone is structured packing;
5) The first upper layer packing region is selected from at least one of wire mesh corrugated packing, plate corrugated packing and plate mesh corrugated packing;
6) The filler material of the first upper filler zone is plastic, ceramic or carbon fiber;
7) The specific surface area of the filler in the first upper filler zone is 250-500 m 2 /m 3 ；
8) The filler void ratio of the first upper filler zone is more than or equal to 95%;
9) The filler inclination angle of the first upper filler zone is 30-45 degrees;
10 The height of the first upper layer filling area is 0.5-1 m;
11 The filler in the first lower layer filler zone is random packing;
12 The packing of the first lower packing region is selected from at least one of Raschig ring packing, pall ring packing and ladder ring packing;
13 The filler material of the first lower layer filler area is plastic, ceramic or carbon fiber;
14 A filler specific surface area of the first lower filler region of 100 to 250m 2 /m 3 ；
15 The nominal size of the filler in the first lower layer filler zone is 5-50 mm;
16 The filler void ratio of the first lower layer filler area is more than or equal to 90 percent;
17 The height of the first lower layer filling area is 1-1.5 m;
18 The packing in the second upper packing zone is structured packing;
19 The filler of the second upper filler zone is selected from at least one of wire mesh corrugated filler, plate corrugated filler and plate mesh corrugated filler;
20 The filler material of the second upper filler zone is a mixture of compost, wood dust, zeolite, ceramsite and carbon;
21 The specific surface area of the filler in the second upper filler zone is more than or equal to 1000m 2 /m 3 ；
22 The filler void ratio of the second upper filler zone is more than or equal to 60 percent;
23 A packing inclination angle of 30-45 degrees in the second upper packing region;
24 The height of the second upper layer filling area is 0.5-1 m;
25 The filler in the second lower filler zone is random packing;
26 The packing of the second lower packing region is selected from at least one of Raschig ring packing, pall ring packing and ladder ring packing;
27 The filler material of the second lower filler zone is a mixture of compost, wood dust, zeolite, ceramsite and carbon;
28 A filler specific surface area of the second lower filler zone is more than or equal to 900m 2 /m 3 ；
29 The nominal size of the filler in the second lower layer filler zone is 5-50 mm;
30 The filler void ratio of the second lower filler zone is more than or equal to 50 percent;
31 The height of the second lower packing region is 1 to 1.5m.
Preferably, the biological section further comprises a built-in biological reaction unit, the pretreatment section further comprises a first residual mixed liquor discharge line, the biological section further comprises a second residual mixed liquor discharge line, the first built-in storage unit is communicated with the built-in biological reaction unit through the first residual mixed liquor discharge line, and the second built-in storage unit is communicated with the built-in biological reaction unit through the second residual mixed liquor discharge line; the built-in biological reaction unit is provided with a gas phase outlet, a liquid phase outlet, an odor discharge pipeline, a first effluent backflow pipeline and a second effluent backflow pipeline, and the gas phase outlet of the built-in biological reaction unit is communicated with the pretreatment section through the pipelines; the liquid phase outlet of the built-in biological reaction unit is communicated with the first built-in storage unit through a first water outlet backflow pipeline, and is communicated with the second built-in storage unit through a second water outlet backflow pipeline.
More preferably, the first built-in storage unit is provided with a first liquid level controller and a pH controller, and the first liquid level controller and the pH controller are in linkage control with the first circulating mixed liquid replenishing pipeline, the first circulating mixed liquid upper circulating pipeline, the first circulating mixed liquid lower circulating pipeline, the first residual mixed liquid discharging pipeline and the first water outlet reflux pipeline through setting of liquid level and pH value; the second built-in storage unit is provided with a second liquid level controller, and the second liquid level controller, the second circulating mixed liquid replenishing pipeline, the second circulating mixed liquid upper circulating pipeline, the second circulating mixed liquid lower circulating pipeline, the second residual mixed liquid discharging pipeline and the second water outlet backflow pipeline are in linkage control through setting of liquid levels.
More preferably, the built-in biological reaction unit is further provided with a third liquid level controller, and the third liquid level controller and the first residual mixed liquid discharge pipeline, the second residual mixed liquid discharge pipeline, the first water outlet backflow pipeline and the second water outlet backflow pipeline realize interlocking control through setting of liquid levels.
The first liquid level controller, the second liquid level controller and the third liquid level controller can comprise a liquid level detection component and a control unit, and the control unit controls the pipeline valves through signal transmission. The pH controller comprises a pH detection component and a control unit, and the control unit controls the valves of all pipelines through signal transmission. Those skilled in the art will readily appreciate that the control unit may be loaded with a control program as described above, or may be implemented using a computer, an integrated circuit module, a programmable logic device, other hardware or existing software modules as in the prior art.
More preferably, the built-in biological reaction unit comprises a suspended filler blocking net, a suspended filler area and a reaction aeration component from top to bottom.
Still more preferably, at least one of the following technical features is also included:
1) The filling ratio of the suspended filler area is 30-60%;
2) The suspension filler is made of high-density polyethylene/polypropylene, has the particle diameter of 10-25 mm, the wall thickness of 0.4-0.8 mm, the length of 10-12 mm and the bulk specific gravity of 94-98 kg/m 3 Specific surface area>500m 2 /m 3 ；
3) The suspension filler interception device consists of a stainless steel porous interception net, the diameter of round holes of the interception net is 6-8 mm, the center distance of the round holes is 9.9-10.1 mm, a coarse bubble diffuser is arranged at the base part of the interception net, and the gas-liquid ratio is 4:1 to 5:1.
preferably, the air supply section comprises a first induced air pipeline, an air blower and a first exhaust pipeline which are sequentially communicated, the biological section is provided with a gas phase outlet, and the gas phase outlet of the biological section is communicated with the air blower through the first induced air pipeline.
More preferably, the built-in biological reaction unit is further provided with an aeration induced air pipeline, and the first exhaust pipeline is communicated with a reaction aeration component in the built-in biological reaction unit through the aeration induced air pipeline.
Still more preferably, still include emergent deodorization section, emergent deodorization section is including the second induced air pipeline, emergent deodorizing device and the second pipeline of airing exhaust that communicate in proper order, biological section is equipped with the gaseous phase export, and the gaseous phase export of biological section passes through first induced air pipeline and second induced air pipeline intercommunication, the second is aired exhaust pipeline and the forced draught blower intercommunication of air supply section.
Still more preferably, the emergency deodorizing device is internally provided with an adsorption filler, the material is activated carbon/carbonaceous matter, the particle size is 3-4 mm, the porosity is 50-60%, and the specific surface area is more than or equal to 1000m 2 /g。
The second aspect of the present invention provides a two-stage layered rear-mounted induced air ring energy type deodorizing process, adopting the deodorizing system of any one of the above-mentioned aspects, comprising the steps of:
1) The malodorous gas enters the pretreatment section and enters the ventilation gallery through the first lower-layer filling area and the first upper-layer filling area; the external mixed liquid enters the first built-in storage unit through the first circulating mixed liquid replenishing pipeline, then one part of the external mixed liquid contacts with the malodorous gas through the first circulating mixed liquid lower layer circulating pipeline through the first circulating mixed liquid lower layer releasing unit, and the other part of the external mixed liquid contacts with the malodorous gas through the first circulating mixed liquid upper layer circulating pipeline through the first circulating mixed liquid upper layer releasing unit and flows to the first built-in storage unit from top to bottom to form circulation;
2) The odor obtained by the treatment in the step 1) enters the biological section through the ventilation gallery and passes through the second lower-layer filling area and the second upper-layer filling area; the external mixed liquid enters the second built-in storage unit through the second circulating mixed liquid replenishing pipeline, then one part of the external mixed liquid contacts with the odor through the second circulating mixed liquid lower layer circulating pipeline through the second circulating mixed liquid lower layer releasing unit, and the other part of the external mixed liquid contacts with the odor through the second circulating mixed liquid upper layer circulating pipeline through the second circulating mixed liquid upper layer releasing unit, and flows to the second built-in storage unit from top to bottom to form circulation.
Preferably, the method further comprises at least one of the following technical characteristics:
1) In the step 1), malodorous gas enters the lower part of the pretreatment section, and external mixed liquid enters a first built-in storage unit positioned at the lower end of a malodorous gas inlet through a first circulating mixed liquid supplementing pipeline;
2) In the step 2), the odor treated in the step 1) enters the lower part of the biological section through a ventilation gallery, and the external mixed liquid enters a second built-in storage unit positioned at the lower end of a gas outlet of the pretreatment section through a second circulating mixed liquid supplementing pipeline;
3) The first residual mixed liquid is introduced into the built-in biological reaction unit through a first residual mixed liquid discharge pipeline, the second residual mixed liquid is introduced into the built-in biological reaction unit through a second residual mixed liquid discharge pipeline for treatment, a gas phase obtained after treatment by the built-in biological reaction unit is introduced into the pretreatment section through a pipeline, a liquid phase obtained after treatment by the built-in biological reaction unit is communicated with the first built-in storage unit through a first water outlet backflow pipeline, and is communicated with the second built-in storage unit through a second water outlet backflow pipeline;
4) The gas treated by the step 2) is discharged to the atmosphere through an air supply section;
5) When the pretreatment section and/or the biological section are maintained and overhauled, the gas treated in the step 2) is treated by the emergency deodorizing section and then is discharged to the atmosphere by the air supply section;
6) In the step 1), the air speed of the pretreatment section air tower is 400-600 m/h;
7) In the step 1), the release amount of the mixed solution is 0.1-10L/m according to the liquid-gas ratio 3 ；
8) In the step 2), the air speed of the biological section air tower is 200-300 m/h;
9) In the step 2), the release amount of the mixed solution is 0.1-10L/m according to the liquid-gas ratio 3 。
More preferably, in the feature 4) or the feature 5), the gas discharged from the air supply section is communicated with the built-in biological reaction unit through an aeration induced air line.
As described above, compared with the prior art, the two-stage layered rear-mounted induced air ring energy type deodorization system and the deodorization process provided by the invention have the following remarkable characteristics:
(1) The two-section deodorization serial process is adopted, each section has different typical malodorous substance removal functions, and the combined process can lead the malodor to obtain ideal removal effect;
(2) The packing carriers with different functional sections are arranged, and the functional sections in the reactor are brought into an optimal state by the way of contact mass transfer between the sections and the mixed liquid, so that the adsorption capacity of the carriers is effectively distributed, the mass transfer efficiency of the carriers is improved, the carrier cleaning period is shortened, the amplification effect of the reaction section is reduced, and the odor removal effect of the reaction section is comprehensively improved;
(3) The emergency deodorization system with special combination is adopted, so that the continuous deodorization effect is achieved while the facility maintenance is met, and the running stability and reliability of the system are improved;
(4) The built-in bioreactor is adopted to recycle the residual mixed solution, so that the external water supplementing quantity is saved, the secondary pollution degree to the environment is reduced, the occupied area of the system is not increased additionally, and the system is more environment-friendly;
(5) The air supply system is arranged at the rear, the main reaction section bears lower air pressure, the leakage rate of the system air and the running noise are lower, and the manufacturing requirements and the cost of corresponding equipment are reduced; the air supply system has high-quality ventilation conditions for a long time, and the service life of the air supply system is prolonged.
Drawings
Fig. 1 is a schematic diagram of a two-stage layered rear-mounted induced-air ring energy type deodorizing system.
Fig. 2 is a two-stage layered rear-mounted induced-air ring energy type deodorizing process flow chart.
Reference numerals:
1-an odor collection line;
2-a pretreatment section; 2 a-a first circulating mixed liquor upper layer releasing unit; 2 b-a first circulating mixed liquor lower layer release unit; 2 c-a first upper packing region; 2 d-a first underfill region; 2 e-a first built-in storage unit; 2 f-a first circulation mixed liquor replenishing pipeline; 2 g-upper circulation line of the first circulation mixed liquor; 2 h-a first circulation mixed solution lower circulation pipeline; 2 i-a first remaining mixed liquor discharge line; 2 j-a first level controller; 2k-pH controller; 2 l-ventilation gallery;
3-biological segments; 3 a-a second circulation mixed liquor upper layer release unit; 3 b-a second recirculating mixed liquor lower layer release unit; 3 c-a second upper packing region; 3 d-a second lower packing region; 3 e-a second built-in storage unit; 3 f-a second circulation mixed liquor replenishing pipeline; 3 g-a second circulation mixed solution upper circulation pipeline; 3 h-a second circulation mixed solution lower circulation pipeline; 3 i-a second remaining mixed liquor discharge line; 3 j-a second level controller;
4-an air supply section; 4 a-a first induced draft line; 4 b-a first exhaust line;
5-an emergency deodorization section; 5 a-a second induced draft line; 5 b-a second exhaust line;
6-a built-in biological reaction unit; 6 a-a suspended packing zone; 6 b-a suspended filler barrier net; 6 c-reaction aeration means; 6 d-a third level controller; 6 e-an odor discharge line; 6 f-aeration induced draft pipeline; 6 g-a first effluent return line; 6 h-a second effluent return line.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It should be understood that the process equipment or devices not specifically identified in the examples below are all conventional in the art.
Furthermore, it is to be understood that the reference to one or more method steps in this disclosure does not exclude the presence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise indicated; it should also be understood that the combined connection between one or more devices/means mentioned in the present invention does not exclude that other devices/means may also be present before and after the combined device/means or that other devices/means may also be interposed between these two explicitly mentioned devices/means, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying the method steps and is not intended to limit the order of arrangement of the method steps or to limit the scope of the invention in which the invention may be practiced, as such changes or modifications in their relative relationships may be regarded as within the scope of the invention without substantial modification to the technical matter.
Example 1
As shown in fig. 1 and 2, a two-stage layered rear-mounted induced air ring energy type deodorization system and a deodorization process are adopted to treat 11000m malodorous gas of urban sewage treatment plant 3 /h。
The deodorizing system comprises an odor collecting pipeline 1, a pretreatment section 2, a biological section 3, an air supply section 4 and an emergency deodorizing section 5;
malodorous gas is introduced into the pretreatment section 2 through a malodorous gas collecting pipeline 1;
the pretreatment section 2 sequentially comprises a first circulating mixed liquor upper layer release unit 2a, a first upper layer filling area 2c, a first circulating mixed liquor lower layer release unit 2b, a first lower layer filling area 2d and a first built-in storage unit 2e from top to bottom; the pretreatment section 2 further comprises a first circulating mixed liquor replenishing pipeline 2f, a first circulating mixed liquor upper circulating pipeline 2g and a first circulating mixed liquor lower circulating pipeline 2h; the external mixed liquor is communicated with the first built-in storage unit 2e through the first circulating mixed liquor replenishing pipeline 2 f; the first built-in storage unit 2e is communicated with the first circulating mixed liquor upper layer release unit 2a through the first circulating mixed liquor upper layer circulating pipeline 2g, and is communicated with the first circulating mixed liquor lower layer release unit 2b through the first circulating mixed liquor lower layer circulating pipeline 2h; the pretreatment section 2 further comprises a ventilation gallery 2l, a pretreatment section gas outlet is arranged above the first circulating mixed liquid upper layer release unit 2a, and the pretreatment section gas outlet is communicated with the biological section 3 through the ventilation gallery 2l; the pretreatment section 2 further comprises a malodorous gas inlet which is arranged at the lower part of the pretreatment section and above the first built-in storage unit 2e;
the biological section 3 sequentially comprises a second circulating mixed liquor upper layer releasing unit 3a, a second upper layer filling area 3c, a second circulating mixed liquor lower layer releasing unit 3b, a second lower layer filling area 3d and a second built-in storage unit 3e from top to bottom; the biological section 3 further comprises a second circulating mixed liquor replenishing pipeline 3f, a second circulating mixed liquor upper circulating pipeline 3g and a second circulating mixed liquor lower circulating pipeline 3h; the external mixed liquor is communicated with the second built-in storage unit 3e through the second circulating mixed liquor replenishing pipeline 3 f; the second built-in storage unit 3e is communicated with the second circulation mixed liquor upper layer release unit 3a through the second circulation mixed liquor upper layer circulation pipeline 3g, and is communicated with the second circulation mixed liquor lower layer release unit 3b through the second circulation mixed liquor lower layer circulation pipeline 3h; the pretreatment section gas outlet is arranged at the lower part of the biological section and above the second built-in storage unit 3e; the biological section 3 further comprises a built-in biological reaction unit 6, the built-in biological reaction unit 6 sequentially comprises a suspended filler blocking net 6b, a suspended filler zone 6a and a reaction aeration component 6c from top to bottom, the pretreatment section 2 further comprises a first residual mixed liquor discharge pipeline 2i, the biological section 3 further comprises a second residual mixed liquor discharge pipeline 3i, the first built-in storage unit 2e is communicated with the built-in biological reaction unit 6 through the first residual mixed liquor discharge pipeline 2i, and the second built-in storage unit 3e is communicated with the built-in biological reaction unit 6 through the second residual mixed liquor discharge pipeline 3 i; the built-in biological reaction unit is provided with a gas phase outlet, a liquid phase outlet, an odor discharge pipeline 6e, a first effluent backflow pipeline 6g and a second effluent backflow pipeline 6h, and the gas phase outlet of the built-in biological reaction unit is communicated with the pretreatment section 2 through pipelines; the liquid phase outlet of the built-in biological reaction unit is communicated with the first built-in storage unit 2e through a first water outlet reflux pipeline 6g, and is communicated with the second built-in storage unit 3e through a second water outlet reflux pipeline 6 h;
the first built-in storage unit 2e is provided with a first liquid level controller 2j and a pH controller 2k, and the first liquid level controller 2j and the pH controller 2k of the built-in storage unit are in linkage control with the first circulating mixed liquid supplementing pipeline 2f, the first circulating mixed liquid upper circulating pipeline 2g, the first circulating mixed liquid lower circulating pipeline 2h, the first residual mixed liquid discharging pipeline 2i and the first water outlet reflux pipeline 6g through setting of liquid level and pH value; the second built-in storage unit 3e is provided with a second liquid level controller 3j, and the second liquid level controller 3j and the second circulating mixed liquid replenishing pipeline 3f, the second circulating mixed liquid upper-layer circulating pipeline 3g, the second circulating mixed liquid lower-layer circulating pipeline 3h, the second residual mixed liquid discharging pipeline 3i and the second water outlet reflux pipeline 6h realize linkage control through setting liquid levels; the built-in biological reaction unit 6 is further provided with a third liquid level controller 6d, and the third liquid level controller 6d and the first residual mixed liquid discharge pipeline 2i, the second residual mixed liquid discharge pipeline 3i, the first water outlet backflow pipeline 6g and the second water outlet backflow pipeline 6h realize linkage control through setting liquid levels;
the air supply section comprises a first induced draft pipeline 4a, an air blower and a first exhaust pipeline 4b which are sequentially communicated, the biological section is provided with a gas phase outlet, and the gas phase outlet of the biological section is communicated with the air blower through the first induced draft pipeline 4 a;
the built-in biological reaction unit 6 is also provided with an aeration induced draft pipeline 6f, and the first exhaust pipeline 4b is communicated with a reaction aeration component 6c in the built-in biological reaction unit 6 through the aeration induced draft pipeline 6 f;
the emergency deodorization section 5 comprises a second induced air pipeline 5a, an emergency deodorization device and a second exhaust pipeline 5b which are sequentially communicated, the biological section is provided with a gas phase outlet, the gas phase outlet of the biological section is communicated with the second induced air pipeline 5a through the first induced air pipeline 4a, and the second exhaust pipeline 5b is communicated with a blower of the air supply section 4.
The deodorizing process adopts the deodorizing system and comprises the following steps:
1) Malodorous gas enters the lower part of the pretreatment section 2 and enters the ventilation gallery 2l through the first lower filler zone 2d and the first upper filler zone 2 c; the external mixed solution enters a first built-in storage unit 2e positioned at the lower end of the malodorous gas inlet through a first circulating mixed solution supplementing pipeline 2f, then one part of the external mixed solution contacts malodorous gas through a first circulating mixed solution lower layer circulating pipeline 2h through a first circulating mixed solution lower layer releasing unit 2b, and the other part of the external mixed solution contacts malodorous gas through a first circulating mixed solution upper layer circulating pipeline 2g through a first circulating mixed solution upper layer releasing unit 2a and flows to the first built-in storage unit 2e from top to bottom to form circulation;
2) The odor treated in the step 1) enters the lower part of the biological section 3 through the ventilation gallery 2l and passes through the second lower-layer filling area 3d and the second upper-layer filling area 3c; the external mixed liquor enters a second built-in storage unit 3e positioned at the lower end of a gas outlet of the pretreatment section through a second circulating mixed liquor replenishing pipeline 3f, then one part of the external mixed liquor contacts with odor through a second circulating mixed liquor lower layer circulating pipeline 3h by a second circulating mixed liquor lower layer releasing unit 3b, and the other part of the external mixed liquor contacts with odor through a second circulating mixed liquor upper layer circulating pipeline 3g by a second circulating mixed liquor upper layer releasing unit 3a and flows to the second built-in storage unit 3e from top to bottom to form circulation; the first residual mixed liquor is introduced into the built-in biological reaction unit 6 through a first residual mixed liquor discharge pipeline 2i, the second residual mixed liquor is introduced into the built-in biological reaction unit 6 through a second residual mixed liquor discharge pipeline 3i for treatment, a gas phase obtained after treatment by the built-in biological reaction unit is introduced into a pretreatment section through a pipeline, a liquid phase obtained after treatment by the built-in biological reaction unit is communicated with the first built-in storage unit 2e through a first water outlet return pipeline 6g, and is communicated with the second built-in storage unit 3e through a second water outlet return pipeline 6 h;
3) The gas treated in the step 2) is discharged to the atmosphere through the air supply section 4;
4) When the pretreatment section 2 and/or the biological section 3 are maintained and overhauled, the gas treated by the step 2) is treated by the emergency deodorization section 5 and then discharged to the atmosphere by the air supply section 4
Or the gas discharged from the air supply section 4 is communicated with the built-in biological reaction unit 6 through an aeration induced draft pipeline 6 f.
In the step 1), the air speed of the air tower in the pretreatment section 2 is 550m/h (the actual operation is 500-600 m/h); the release amount of the mixed solution is 2.5L/m according to the liquid-gas ratio 3 (actual operation 2-3L/m) 3 )；
In the step 2), the air speed of the biological section 3 air tower is 275m/h (200-300 m/h); the release amount of the mixed solution is 5L/m according to the liquid-gas ratio 3 (actual operation 4-6L/m) 3 )；
The filler in the first upper filler zone 2c of the pretreatment section 2 is structured filler (plate net corrugated filler), the filler material is preferably polyurethane, and the specific surface area is 300m 2 /m 3 The void ratio is more than or equal to 95%, the inclination angle is 45 degrees, and the height of a filling area is 0.5m; the filler in the region 2d of the first lower layer filler is random packing (pall ring filler), the filler material is polyurethane, and the specific surface area is 150m 2 /m 3 The nominal size is 20-30 mm, the void ratio is more than or equal to 90%, and the height of the filling area is 1.0m.
The filler in the second upper filler zone 3c of the biological section 3 is structured filler (plate net corrugated filler), the filler material is preferably a carbonaceous material, and the specific surface area is more than or equal to 1000m 2 /m 3 The void ratio is more than or equal to 60%, the inclination angle is 45 degrees, and the height of a filling area is 0.5m; the 3d filler in the second lower filler zone is random packing (pall ring filler), the filler material is preferably a carbonaceous material, and the specific surface area is more than or equal to 900m 2 /m 3 The nominal size is 20-30 mm, the void ratio is more than or equal to 50%, and the height of the filling area is 1.0m.
The mixed liquor releasing device of the first circulating mixed liquor upper layer releasing unit 2 a/the first circulating mixed liquor lower layer releasing unit 2 b/the second circulating mixed liquor upper layer releasing unit 3 a/the second circulating mixed liquor lower layer releasing unit 3b adopts an atomizing nozzle.
The main materials of the first circulating mixed liquor replenishing pipeline 2 f/the second circulating mixed liquor replenishing pipeline 3f, the first circulating mixed liquor upper layer circulating pipeline 2 g/the first circulating mixed liquor lower layer circulating pipeline 2 h/the second circulating mixed liquor upper layer circulating pipeline 3 g/the second circulating mixed liquor lower layer circulating pipeline 3h, the first residual mixed liquor discharging pipeline 2 i/the second residual mixed liquor discharging pipeline 3i are preferably stainless steel, and an electric valve is arranged in the system for controlling;
the first built-in storage unit 2 e/the second built-in storage unit 3e is made of glass fiber reinforced plastic, and the retention time is 0.2h; the first liquid level controller 2j of the pretreatment section/the liquid level controller 3j of the biological section are ultrasonic liquid level meters, and the pH controller 2k of the pretreatment section is an on-line pH meter.
The main materials of the air supply sections of the odor collection pipelines 1 and 4 are preferably glass fiber reinforced plastics, a control air valve is arranged in the air supply sections, and the cross section of the air supply sections is square.
The built-in biological reaction unit 6 is made of glass fiber reinforced plastic, the hydraulic retention time is 6h, and the filling ratio of the suspended filler area 6a is 35%; the suspension filler consists of high-quality suspension filler, and is made of high-density polyethylene, with a particle diameter of 25mm, a wall thickness of 0.4mm, a length of 10m and a bulk specific gravity of 96+/-2 kg/m 3 Specific surface area>500m 2 /m 3 The method comprises the steps of carrying out a first treatment on the surface of the The suspension filler interception device consists of a stainless steel porous interception net, the diameter of round holes of the interception net is 8mm, the center distance of the round holes is 10mm, a coarse bubble diffuser (a reaction aeration component 6 c) is arranged at the base part of the interception net, and the gas-liquid ratio is 4.5:1 (actual operation 4:1-5:1). The third liquid level controller 6d is an ultrasonic liquid level meter.
An adsorption filler is arranged in the emergency deodorizing device of the emergency deodorizing section 5, the main material is preferably activated carbon, the particle size is 3-4 mm, the porosity is 55%, and the specific surface area is more than or equal to 1000m 2 /g；
Main reactor (pretreatment section + biological section) structural dimensions: l×b×h=15×4×3.3m (1 seat in total).
The implementation effect is as follows:
the main components of the imported malodorous gas are as follows: concentration of hydrogen sulfide: 10mg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the Ammonia concentration: 30mg/m 3 ；
After the deodorization process is used for treatment, the main malodorous pollutants can reach below the first-level standard of the factory world of pollutant emission Standard of urban wastewater treatment plants (GB 18918-2002).
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The two-section layered rear induced draft deodorizing system is characterized by comprising a pretreatment section (2) and a biological section (3);
the pretreatment section (2) comprises a first circulating mixed liquid upper layer release unit (2 a), a first upper layer filling area (2 c), a first circulating mixed liquid lower layer release unit (2 b), a first lower layer filling area (2 d) and a first built-in storage unit (2 e) from top to bottom in sequence; the pretreatment section (2) further comprises a first circulating mixed liquor replenishing pipeline (2 f), a first circulating mixed liquor upper-layer circulating pipeline (2 g) and a first circulating mixed liquor lower-layer circulating pipeline (2 h); the external mixed liquor is communicated with the first built-in storage unit (2 e) through the first circulating mixed liquor replenishing pipeline (2 f); the first built-in storage unit (2 e) is communicated with the first circulating mixed liquor upper layer release unit (2 a) through the first circulating mixed liquor upper layer circulating pipeline (2 g), and is communicated with the first circulating mixed liquor lower layer release unit (2 b) through the first circulating mixed liquor lower layer circulating pipeline (2 h); the pretreatment section (2) further comprises a ventilation gallery (2 l), a pretreatment section gas outlet is arranged above the first circulating mixed liquid upper layer release unit (2 a), and the pretreatment section gas outlet is communicated with the biological section (3) through the ventilation gallery (2 l); the packing in the first upper packing zone is structured packing; the packing in the first lower packing area is random packing; the packing in the second upper packing zone is structured packing; the filler in the second lower filler zone is random packing;
the biological section (3) sequentially comprises a second circulating mixed liquid upper layer release unit (3 a), a second upper layer filler region (3 c), a second circulating mixed liquid lower layer release unit (3 b), a second lower layer filler region (3 d) and a second built-in storage unit (3 e) from top to bottom; the biological section (3) further comprises a second circulating mixed liquor replenishing pipeline (3 f), a second circulating mixed liquor upper circulating pipeline (3 g) and a second circulating mixed liquor lower circulating pipeline (3 h); the external mixed liquor is communicated with the second built-in storage unit (3 e) through the second circulating mixed liquor replenishing pipeline (3 f); the second built-in storage unit (3 e) is communicated with the second circulation mixed liquor upper layer release unit (3 a) through the second circulation mixed liquor upper layer circulation pipeline (3 g), and is communicated with the second circulation mixed liquor lower layer release unit (3 b) through the second circulation mixed liquor lower layer circulation pipeline (3 h);
the biological section (3) further comprises a built-in biological reaction unit (6), the pretreatment section (2) further comprises a first residual mixed liquor discharge pipeline (2 i), the biological section (3) further comprises a second residual mixed liquor discharge pipeline (3 i), the first built-in storage unit (2 e) is communicated with the built-in biological reaction unit (6) through the first residual mixed liquor discharge pipeline (2 i), and the second built-in storage unit (3 e) is communicated with the built-in biological reaction unit (6) through the second residual mixed liquor discharge pipeline (3 i); the built-in biological reaction unit is provided with a gas phase outlet, a liquid phase outlet, an odor discharge pipeline (6 e), a first effluent backflow pipeline (6 g) and a second effluent backflow pipeline (6 h), and the gas phase outlet of the built-in biological reaction unit is communicated with the pretreatment section (2) through pipelines; the liquid phase outlet of the built-in biological reaction unit is communicated with the first built-in storage unit (2 e) through a first water outlet backflow pipeline (6 g), and is communicated with the second built-in storage unit (3 e) through a second water outlet backflow pipeline (6 h);
the biological air supply device comprises a biological section and is characterized by further comprising an air supply section (4), wherein the air supply section comprises a first induced air pipeline (4 a), an air blower and a first exhaust pipeline (4 b) which are sequentially communicated, the biological section is provided with a gas phase outlet, and the gas phase outlet of the biological section is communicated with the air blower through the first induced air pipeline (4 a); the built-in biological reaction unit (6) is also provided with an aeration induced air pipeline (6 f), and the first exhaust pipeline (4 b) is communicated with a reaction aeration component (6 c) in the built-in biological reaction unit (6) through the aeration induced air pipeline (6 f); still include emergent deodorization section (5), emergent deodorization section (5) are including second induced air pipeline (5 a), emergent deodorizing device and the second pipeline of airing exhaust (5 b) that communicate in proper order, biological section is equipped with the gaseous phase export, and the gaseous phase export of biological section passes through first induced air pipeline (4 a) and second induced air pipeline (5 a) intercommunication, second pipeline of airing exhaust (5 b) and the forced draught blower intercommunication of air supply section (4).
2. The two-stage layered post-induced draft deodorizing system of claim 1 further comprising at least one of the following features:
1) The deodorizing system further comprises an odor collecting pipeline (1), and malodorous gas is introduced into the pretreatment section (2) through the odor collecting pipeline (1);
2) The pretreatment section (2) further comprises a malodorous gas inlet which is arranged at the lower part of the pretreatment section and above the first built-in storage unit (2 e);
3) The pretreatment section gas outlet is arranged at the lower part of the biological section and above the second built-in storage unit (3 e);
4) The first upper layer packing region is selected from at least one of wire mesh corrugated packing, plate corrugated packing and plate mesh corrugated packing;
5) The filler material of the first upper filler zone is plastic, ceramic or carbon fiber;
6) The specific surface area of the filler in the first upper filler zone is 250-500 m 2 /m 3 ；
7) The filler void ratio of the first upper filler zone is more than or equal to 95%;
8) The filler inclination angle of the first upper filler zone is 30-45 degrees;
9) The height of the first upper layer filling area is 0.5-1 m;
10 The packing of the first lower packing region is selected from at least one of Raschig ring packing, pall ring packing and ladder ring packing;
11 The filler material of the first lower layer filler area is plastic, ceramic or carbon fiber;
12 A filler specific surface area of the first lower filler region of 100 to 250m 2 /m 3 ；
13 The nominal size of the filler in the first lower layer filler zone is 5-50 mm;
14 The filler void ratio of the first lower layer filler area is more than or equal to 90 percent;
15 The height of the first lower layer filling area is 1-1.5 m;
16 The filler of the second upper filler zone is selected from at least one of wire mesh corrugated filler, plate corrugated filler and plate mesh corrugated filler;
17 The filler material of the second upper filler zone is a mixture of compost, wood dust, zeolite, ceramsite and carbon;
18 The specific surface area of the filler in the second upper filler zone is more than or equal to 1000m 2 /m 3 ；
19 The filler void ratio of the second upper filler zone is more than or equal to 60 percent;
20 A packing inclination angle of 30-45 degrees in the second upper packing region;
21 The height of the second upper layer filling area is 0.5-1 m;
22 The packing of the second lower packing region is selected from at least one of Raschig ring packing, pall ring packing and ladder ring packing;
23 The filler material of the second lower filler zone is a mixture of compost, wood dust, zeolite, ceramsite and carbon;
24 A filler specific surface area of the second lower filler zone is more than or equal to 900m 2 /m 3 ；
25 The nominal size of the filler in the second lower layer filler zone is 5-50 mm;
26 The filler void ratio of the second lower filler zone is more than or equal to 50 percent;
27 The height of the second lower packing region is 1 to 1.5m.
3. The two-stage layered rear-mounted induced draft deodorizing system according to claim 1, wherein the first built-in storage unit (2 e) is provided with a first liquid level controller (2 j) and a pH controller (2 k), and the first liquid level controller (2 j), the pH controller (2 k) and the first circulating mixed liquid replenishing pipeline (2 f), the first circulating mixed liquid upper circulating pipeline (2 g), the first circulating mixed liquid lower circulating pipeline (2 h), the first residual mixed liquid discharging pipeline (2 i) and the first water outlet reflux pipeline (6 g) are controlled in a linkage manner by setting liquid levels and pH values; the second built-in storage unit (3 e) is provided with a second liquid level controller (3 j), and the second liquid level controller (3 j) and the second circulating mixed liquid supplementing pipeline (3 f), the second circulating mixed liquid upper circulating pipeline (3 g), the second circulating mixed liquid lower circulating pipeline (3 h), the second residual mixed liquid discharging pipeline (3 i) and the second water outlet backflow pipeline (6 h) realize linkage control through setting of liquid levels.
4. The two-stage layered rear-mounted induced draft deodorizing system according to claim 1, wherein the built-in biological reaction unit (6) is further provided with a third liquid level controller (6 d), and the third liquid level controller (6 d) is in linkage control with the first residual mixed liquid discharge line (2 i), the second residual mixed liquid discharge line (3 i), the first water outlet return line (6 g) and the second water outlet return line (6 h) through setting of liquid levels.
5. The two-stage layered rear-mounted induced draft deodorizing system according to claim 1, wherein the built-in biological reaction unit (6) comprises a suspended filler blocking net (6 b), a suspended filler zone (6 a) and a reaction aeration member (6 c) in this order from top to bottom.
6. The two-stage layered post-induced draft deodorizing system of claim 5 further comprising at least one of the following features:
1) The filling ratio of the suspended filler area is 30-60%;
2) The suspension filler is made of high-density polyethylene/polypropylene, has the particle diameter of 10-25 mm, the wall thickness of 0.4-0.8 mm, the length of 10-12 mm and the bulk specific gravity of 94-98 kg/m 3 Specific surface area>500m 2 /m 3 ；
3) The suspension filler interception device consists of a stainless steel porous interception net, the diameter of round holes of the interception net is 6-8 mm, the center distance of the round holes is 9.9-10.1 mm, a coarse bubble diffuser is arranged at the base part of the interception net, and the gas-liquid ratio is 4:1 to 5:1.
7. the two-stage layered rear-mounted induced air deodorizing system according to claim 1, wherein the emergency deodorizing device is internally provided with an adsorption filler, the adsorption filler is made of activated carbon/carbonaceous materials, the particle size is 3-4 mm, the porosity is 50% -60%, and the specific surface area is more than or equal to 1000m2/g.
8. A two-stage layered post-induced draft deodorizing process, characterized by employing a deodorizing system according to any one of claims 1 to 7, comprising the steps of:
1) Malodorous gas enters the pretreatment section (2) and enters the ventilation gallery (2 l) through the first lower filler zone (2 d) and the first upper filler zone (2 c); the external mixed liquid enters a first built-in storage unit (2 e) through a first circulating mixed liquid replenishing pipeline (2 f), then a part of the external mixed liquid contacts with malodorous gas through a first circulating mixed liquid lower layer circulating pipeline (2 h) through a first circulating mixed liquid lower layer releasing unit (2 b), and the other part of the external mixed liquid contacts with malodorous gas through a first circulating mixed liquid upper layer circulating pipeline (2 g) through a first circulating mixed liquid upper layer releasing unit (2 a) and flows to the first built-in storage unit (2 e) from top to bottom to form circulation;
2) The odor obtained by the treatment in the step 1) enters the biological section (3) through the ventilation gallery (2 l) and passes through the second lower-layer filling area (3 d) and the second upper-layer filling area (3 c); the external mixed liquid enters the second built-in storage unit (3 e) through the second circulating mixed liquid replenishing pipeline (3 f), then one part of the external mixed liquid contacts with the odor through the second circulating mixed liquid lower layer releasing unit (3 b) through the second circulating mixed liquid lower layer circulating pipeline (3 h), and the other part of the external mixed liquid contacts with the odor through the second circulating mixed liquid upper layer releasing unit (3 a) through the second circulating mixed liquid upper layer circulating pipeline (3 g) and flows to the second built-in storage unit (3 e) from top to bottom to form circulation.
9. The two-stage layered post-induced draft deodorizing process of claim 8, further comprising at least one of the following technical features:
1) In the step 1), malodorous gas enters the lower part of the pretreatment section, and external mixed liquid enters a first built-in storage unit (2 e) positioned at the lower end of a malodorous gas inlet through a first circulating mixed liquid supplementing pipeline (2 f);
2) In the step 2), the odor treated in the step 1) enters the lower part of the biological section (3) through a ventilation gallery (2 l), and the external mixed solution enters a second built-in storage unit (3 e) positioned at the lower end of a gas outlet of the pretreatment section through a second circulating mixed solution supplementing pipeline (3 f);
3) The first residual mixed liquor is introduced into a built-in biological reaction unit (6) through a first residual mixed liquor discharge pipeline (2 i), the second residual mixed liquor is introduced into the built-in biological reaction unit (6) through a second residual mixed liquor discharge pipeline (3 i), a gas phase obtained after being treated by the built-in biological reaction unit is introduced into a pretreatment section through a pipeline, a liquid phase obtained after being treated by the built-in biological reaction unit is communicated with a first built-in storage unit (2 e) through a first water outlet return pipeline (6 g), and is communicated with a second built-in storage unit (3 e) through a second water outlet return pipeline (6 h);
4) The gas treated in the step 2) is discharged to the atmosphere through an air supply section (4);
5) When the pretreatment section (2) and/or the biological section (3) are maintained and overhauled, the gas treated in the step (2) is treated by the emergency deodorization section (5) and then is discharged to the atmosphere by the air supply section (4);
6) In the step 1), the air speed of the air tower in the pretreatment section (2) is 400-600 m/h;
7) In the step 1), the release amount of the mixed solution is 0.1-10L/m according to the liquid-gas ratio 3 ；
8) In the step 2), the air speed of the biological section (3) is 200-300 m/h;
9) In the step 2), the release amount of the mixed solution is 0.1-10L/m according to the liquid-gas ratio 3 。
10. The two-stage layered post-induced draft deodorization process according to claim 9, wherein in the feature 4) or the feature 5), the gas exhausted from the air supply stage (4) is communicated with the built-in biological reaction unit (6) through an aeration induced draft pipeline (6 f).
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