CN107837675B - High-temperature waste gas purification treatment method, microorganism substrate filler and equipment thereof - Google Patents

High-temperature waste gas purification treatment method, microorganism substrate filler and equipment thereof Download PDF

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CN107837675B
CN107837675B CN201711131732.4A CN201711131732A CN107837675B CN 107837675 B CN107837675 B CN 107837675B CN 201711131732 A CN201711131732 A CN 201711131732A CN 107837675 B CN107837675 B CN 107837675B
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waste gas
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filler layer
purification treatment
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CN107837675A (en
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黄建军
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Guangdong Longyue Environmental Technology Co ltd
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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
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0035—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by wetting, e.g. using surfaces covered with oil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1406—Multiple stage absorption
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1487—Removing organic compounds
    • 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
    • B01D53/14—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 by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B01D53/185—Liquid distributors
    • 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
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—Organic components
    • 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
    • B01D53/85—Biological processes with gas-solid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/91—Bacteria; Microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • 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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  • Life Sciences & Earth Sciences (AREA)
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  • Biological Treatment Of Waste Water (AREA)

Abstract

The invention relates to the technical field of waste gas purification treatment, in particular to a high-temperature waste gas purification treatment method, microorganism base filler and equipment thereof, wherein the treatment method comprises the following steps: A. and (3) cooling treatment of waste gas: cooling the exhaust gas by using a heat exchanger; B. pretreatment of waste gas: the purifying liquid is used for spraying the pretreatment filter layer to filter and purify the waste gas after the cooling treatment; C. and (3) secondary purification treatment: b, spraying purification treatment spray to the waste gas flowing out of the step B, and performing secondary purification treatment on the waste gas by the purification treatment spray; D. biological purification treatment: and C, spraying a purifying liquid on the microbial base filler layer, and performing biological purification treatment on the waste gas treated in the step C through the microbial base filler layer to finish the treatment. The treatment method of the invention cools the waste gas by a heat dissipation mode of heat exchange, thereby taking away most of heat in the waste gas, avoiding that excessive heat contained in the waste gas enters into the biological filter bed to influence the growth of microorganisms at the rear end of the purification equipment, and further ensuring that the microorganism purification treatment of the waste gas of the biological filter bed can be efficiently carried out.

Description

High-temperature waste gas purification treatment method, microorganism substrate filler and equipment thereof
Technical Field
The invention relates to the technical field of waste gas purification treatment, in particular to a high-temperature waste gas purification treatment method, microorganism substrate filler and equipment thereof.
Background
The dye, pesticide, spice production, lacquer making, paint spraying, pharmacy, shoemaking, furniture manufacturing and other industries widely applied chemical raw materials or solvents, which can generate organic waste gas in the production process, pollute the environment, are commonly called VOCs and peculiar smell waste gas in industry, have influence on central nerves, and lead people to have strong excitation or inhibition of the nerves, such as agitation, fooldness, sleepiness and the like; furthermore, the toxic effects of xylene are largely divided into nephrotoxicity, embryogenic or reproductive toxicity and neurotoxicity. In recent years, VOCs and odorous waste gases present a considerable environmental threat in southeast coastal areas, particularly in the coastal shoemaking industry. Compared with the conventional physicochemical methods such as adsorption purification technology and catalytic combustion purification technology, the biological method has the advantages of simple equipment, low investment, low operation cost, no secondary pollution and the like, and particularly has incomparable economical efficiency with other methods when treating low concentration (< 0.1%).
Currently, the apparatus for treating the exhaust gas by biological methods is generally a biological filter bed, and the biological filter bed commonly used at present has the following three types: first kind: inorganic filler is used as a substrate material for microorganism adhesion growth, and nutrient solution is continuously supplied to provide nutrients for microorganism growth; second,: organic filler is adopted as a substrate material for microorganism adhesion growth; third kind: the organic and inorganic fillers are combined with the stroke substrate. However, the three fillers all have certain defects, and firstly, the nutrient solution required by organisms is required to be sprayed uninterruptedly, so that the maintenance cost is high; after the second substrate material is gradually consumed by microorganisms, the structure of the filler layer is changed, collapse is easy to occur, the air permeability is gradually deteriorated, the microorganism growth environment is deteriorated, the waste gas purification efficiency is reduced, and finally the substrate material has to be replaced, so that waste is easy to cause and the cost is high; the existing third biological filter bed substrate material has the problems that organic components are gradually consumed by microorganisms along with the increase of the service time, the substrate material layer is easy to collapse, the air permeability of the substrate material is poor, and the growth of the microorganisms is limited. Therefore, the substrate material with good structural stability and low maintenance cost is a material which is urgently needed by the current biological filter bed.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a high-temperature waste gas purification treatment method which reduces the temperature of waste gas by a heat exchange radiating mode so as to take away most of heat in the waste gas, prevent excessive heat contained in the waste gas from entering a biological filter bed and affecting the growth of microorganisms at the rear end of purification equipment, and further ensure that the microorganism purification treatment of the waste gas of the biological filter bed can be performed efficiently.
The invention also aims to provide the microbial base filler of the biological filter bed, which has good structural stability, does not collapse after long-term use and does not cause poor air permeability, the filler can provide nutrients for the growth of microorganisms, no nutrient solution is needed, and the operation and maintenance costs are low.
The invention further aims to provide high-temperature waste gas purifying equipment which is suitable for the high-temperature waste gas purifying treatment method, and the equipment cools the waste gas in a heat dissipation mode of heat exchange, so that most of heat in the waste gas is taken away, excessive heat contained in the waste gas is prevented from entering a biological filter bed, and the growth of microorganisms at the rear end of the purifying equipment is prevented, so that the microorganism purifying treatment waste gas of the biological filter bed can be effectively carried out, the operation is efficient, and the maintenance cost is low.
The aim of the invention is achieved by the following technical scheme: a high-temperature waste gas purifying treatment method comprises the following steps: A. and (3) cooling treatment of waste gas: cooling the exhaust gas by using a heat exchanger; B. pretreatment of waste gas: the purifying liquid is used for spraying the pretreatment filter layer to filter and purify the waste gas after the cooling treatment; C. and (3) secondary purification treatment: b, spraying purification treatment spray to the waste gas flowing out of the step B, and performing secondary purification treatment on the waste gas by the purification treatment spray; D. biological purification treatment: and C, spraying a purifying liquid on the microbial base filler layer, and performing biological purification treatment on the waste gas treated in the step C through the microbial base filler layer to finish the treatment.
Wherein the temperature of the waste gas after the temperature reduction treatment in the step A is kept at 35-45 ℃.
Wherein, the purifying liquid used in the step B and the step D is as follows: plant fluid or EM bacteria fluid; the pretreatment filter layer is a hollow sphere filter layer.
The microbial base filler for the biological filter bed consists of a volcanic rock layer, a lower graded mixed filler layer, a carbon filler layer, an upper graded mixed filler layer and an organic fertilizer filler layer which are sequentially arranged from bottom to top, wherein the lower graded mixed filler layer and the upper graded mixed filler layer comprise the following raw materials in parts by weight: 45-55 parts of pine bark, 15-25 parts of volcanic rock, 4-6 parts of shell powder, 8-12 parts of activated carbon, 8-12 parts of hollow spheres and 4-6 parts of organic fertilizer.
Preferably, the lower grading mixed filler layer and the upper grading mixed filler layer comprise the following raw materials in parts by weight: 45-50 parts of pine bark, 15-20 parts of volcanic rock, 4-5 parts of shell powder, 8-10 parts of activated carbon, 8-10 parts of hollow spheres and 4-5 parts of organic fertilizer.
Preferably, the lower grading mixed filler layer and the upper grading mixed filler layer comprise the following raw materials in parts by weight: 50-55 parts of pine bark, 20-25 parts of volcanic rock, 5-6 parts of shell powder, 10-12 parts of activated carbon, 10-12 parts of hollow spheres and 5-6 parts of organic fertilizer.
Most preferably, the lower graded mixed filler layer and the upper graded mixed filler layer each comprise the following raw materials in parts by weight: 50 parts of pine bark, 20 parts of volcanic rock, 5 parts of shell powder, 10 parts of activated carbon, 10 parts of hollow spheres and 5 parts of organic fertilizer.
The thickness of the volcanic rock layer is 180-220mm, the thickness of the lower graded mixed filler layer is 700-900mm, the thickness of the carbon locking filler layer is 80-120mm, and the thickness of the upper graded mixed filler layer is 350-450mm.
The high-temperature waste gas purifying device comprises a biological filter bed, a heat exchanger arranged at the air inlet end of the biological filter bed and used for cooling waste gas, an exhaust unit arranged at the air outlet end of the biological filter bed, and a chimney arranged at the air outlet end of the exhaust unit.
The biological filter bed comprises a box body and two groups of filter components which are respectively arranged at the upper half part and the lower half part of the box body, wherein the filter components comprise a pretreatment filter layer and a microorganism base filler layer, the pretreatment filter layer is positioned at the left side of the microorganism base filler layer, a partition plate is arranged between the pretreatment filter layer and the microorganism base filler layer, an air distribution cavity is formed between the two pretreatment filter layers, an air guide cavity is formed between the two microorganism base filler layers, the air distribution cavity is communicated with the air guide cavity, an upper air inlet and an upper air inlet are formed in the box body, and the upper air inlet are communicated with the air outlet end of the heat exchanger.
An upper air inlet channel is formed between the upper air inlet and a pretreatment filter layer positioned at the upper half part of the box body, a lower air inlet channel is formed between the side air inlet and a pretreatment filter layer positioned at the lower half part of the box body, an upper air exhaust channel is formed between a microorganism base packing layer positioned at the upper half part of the box body and the box body, a lower air exhaust channel is formed between the microorganism base packing layer positioned at the lower half part of the box body and the box body, a deep treatment spray layer is arranged in the upper air exhaust channel, and an intermediate treatment spray layer is arranged in the air guide cavity.
The pretreatment spraying layers are horizontally and uniformly distributed by a plurality of nozzles, and the distance between two adjacent nozzles in the pretreatment spraying layers is 45-55cm; the advanced treatment spraying layer in the upper exhaust passage is a single layer, the advanced treatment spraying layer is formed by horizontally and uniformly distributing a plurality of spray heads, the intermediate treatment spraying layer is formed by a plurality of spray heads for spraying the purifying liquid, and the distance between two adjacent spray heads in the advanced treatment spraying layer is 900-1100cm.
Wherein, the top of the box body is provided with a plurality of upper exhaust ports which are communicated with the upper exhaust channel; an exhaust pipe is arranged in the lower exhaust passage, a plurality of exhaust holes are uniformly distributed at the bottom of the exhaust pipe along the length direction of the exhaust pipe, the exhaust pipe is communicated with the lower exhaust passage through the exhaust holes, and the upper exhaust port and the air outlet end of the exhaust pipe are both communicated with the air inlet end of the exhaust unit; the water storage tank is further arranged, the water outlet end of the water storage tank is communicated with the advanced treatment spraying layer, and a water suction pump is further arranged between the water storage tank and the advanced treatment spraying layer.
Wherein the microorganism base filler layer adopts the microorganism base filler of the biological filter bed.
Wherein the microorganism base filler layer adopted in the step D in the high-temperature waste gas purification treatment method is the microorganism base filler of the biological filter bed.
Drawings
Fig. 1 is a schematic structural view of a high-temperature exhaust gas purifying apparatus of the present invention;
FIG. 2 is a schematic view of the structure of the biological filter of the present invention;
FIG. 3 is a cross-sectional view of a biofilter bed microbial substrate packing of the invention;
the reference numerals are: the biological filter bed 1, the box 101, the pretreatment filter layer 102, the microorganism base filler layer 103, the partition 104, the air distribution cavity 105, the air guide cavity 106, the upper air inlet 107, the side air inlet 108, the upper air inlet channel 109, the lower air inlet channel 110, the upper air outlet channel 111, the lower air outlet channel 112, the advanced treatment spray layer 113, the pretreatment spray layer 114, the upper air outlet 115, the air outlet pipe 116, the air outlet 117, the support layer 118, the volcanic layer 119, the lower graded mixed filler layer 120, the carbon filler layer 121, the upper graded mixed filler layer 122, the organic fertilizer filler layer 123, the intermediate treatment spray layer 124, the heat exchanger 2, the exhaust unit 3, the chimney 4, the water storage tank 5 and the water suction pump 6.
Detailed Description
The present invention is further described below with reference to examples and fig. 1-3, which are not intended to be limiting, for the purpose of facilitating understanding of those skilled in the art.
Example 1
A high-temperature waste gas purifying treatment method comprises the following steps: A. and (3) cooling treatment of waste gas: cooling the exhaust gas by using a heat exchanger; B. pretreatment of waste gas: the purifying liquid is used for spraying the pretreatment filter layer to filter and purify the waste gas after the cooling treatment; C. and (3) secondary purification treatment: b, spraying purification treatment spray to the waste gas flowing out of the step B, and performing secondary purification treatment on the waste gas by the purification treatment spray; D. biological purification treatment: and C, spraying a purifying liquid on the microbial base filler layer, and performing biological purification treatment on the waste gas treated in the step C through the microbial base filler layer to finish the treatment.
Wherein, the temperature of the waste gas after the temperature reduction treatment in the step A is kept at 35 ℃.
Wherein, the purifying liquid used in the step B is as follows: the purifying liquid used in the step B and the step D is as follows: a plant liquid; the pretreatment filter layer is a hollow sphere filter layer.
The biological filter bed microbial base filler consists of a volcanic rock layer 119, a lower graded mixed filler layer 120, a carbon filler layer 121, an upper graded mixed filler layer 122 and an organic fertilizer filler layer 123 which are sequentially arranged from bottom to top, wherein the lower graded mixed filler layer 120 and the upper graded mixed filler layer 122 comprise the following raw materials in parts by weight: 45 parts of pine bark, 15 parts of volcanic rock, 4 parts of shell powder, 8 parts of activated carbon, 8 parts of hollow spheres and 4 parts of organic fertilizer.
Wherein the thickness of volcanic layer 119 is 180mm, the thickness of lower graded mixed filler layer 120 is 700mm, the thickness of carbon-locked filler layer 121 is 80mm, and the thickness of upper graded mixed filler layer 122 is 350mm.
The high-temperature waste gas purifying device comprises a biological filter bed 1, a heat exchanger 2 arranged at the air inlet end of the biological filter bed 1 and used for cooling waste gas, an exhaust unit 3 arranged at the air outlet end of the biological filter bed 1, and a chimney 4 arranged at the air outlet end of the exhaust unit 3.
The filter assembly comprises a box body 101 and two groups of filter assemblies which are respectively arranged on the upper half part and the lower half part of the box body 101, wherein the filter assemblies comprise a pretreatment filter layer 102 and a microorganism base filler layer 103, the pretreatment filter layer 102 is positioned on the left side of the microorganism base filler layer 103, a partition plate 104 is arranged between the pretreatment filter layer 102 and the microorganism base filler layer 103, an air distribution cavity 105 is formed between the two pretreatment filter layers 102, an air guide cavity 106 is formed between the two microorganism base filler layers 103, the air distribution cavity 105 is communicated with the air guide cavity 106, an upper air inlet 107 and a side air inlet 108 are formed in the box body 101, and the upper air inlet 107 and the side air inlet 108 are both communicated with the air outlet end of the heat exchanger 2.
Wherein, an upper air inlet channel 109 is formed between the upper air inlet 107 and the pretreatment filter layer 102 located at the upper half of the box body 101, a lower air inlet channel 110 is formed between the side air inlet 108 and the pretreatment filter layer 102 located at the lower half of the box body 101, an upper air outlet channel 111 is formed between the microbial base filler layer 103 located at the upper half of the box body 101 and the box body 101, a lower air outlet channel 112 is formed between the microbial base filler layer 103 located at the lower half of the box body 101 and the box body 101, a deep treatment spray layer 113 is arranged in the upper air outlet channel 111, and an intermediate treatment spray layer 124 is arranged in the air guide cavity 106.
The biological filter bed 1 of the invention adopts the structural design, has compact structure and small occupied space, can effectively save space, effectively overcomes the defects of overlarge volume, overlarge occupied area and difficult popularization of the traditional biological filter bed, and is convenient for popularization and use in a large range.
Wherein, the upper air inlet channel 109 and the air distribution cavity 105 are internally provided with a pretreatment spray layer 114 for spraying treatment liquid for purifying waste gas, and the pretreatment spray layer 114 is formed by horizontally and uniformly distributing a plurality of nozzles.
Wherein, the distance between two adjacent nozzles in the pretreatment spray layer 114 is 45 cm to 55cm.
The advanced treatment spraying layer 113 in the upper exhaust passage 111 is a single layer, the advanced treatment spraying layer 113 is formed by horizontally and uniformly distributing a plurality of spray heads, and the intermediate treatment spraying layer is formed by a plurality of spray heads for spraying the purifying liquid.
Wherein, the distance between two adjacent spray heads in the advanced treatment spray layer 113 is 900-1100cm.
Wherein, a plurality of upper exhaust ports 115 are arranged at the top of the box 101, and the upper exhaust ports 115 are communicated with the upper exhaust channel 111; an exhaust pipe 116 is arranged in the lower exhaust passage 112, a plurality of exhaust holes 117 are uniformly distributed at the bottom of the exhaust pipe 116 along the length direction of the exhaust pipe, the exhaust pipe 116 is communicated with the lower exhaust passage 112 through the exhaust holes 117, and the upper exhaust port 115 and the air outlet end of the exhaust pipe 116 are communicated with the air inlet end of the exhaust fan unit 3.
The bottom of the microbial base filler layer 103 is provided with a supporting layer 118, and the supporting layer 118 is a glass fiber reinforced plastic grid layer.
The water storage tank 5 is further included, the water outlet end of the water storage tank 5 is communicated with the advanced treatment spraying layer, and a water suction pump 6 is further arranged between the water storage tank 5 and the advanced treatment spraying layer.
Wherein the pretreatment filter layer 102 is a hollow sphere filter layer.
Example 2
This embodiment differs from embodiment 1 in that:
and (C) maintaining the temperature of the waste gas subjected to the cooling treatment in the step A at 38 ℃.
The purifying liquid used in the step B is as follows: the purifying liquid used in the step B and the step D is as follows: an EM bacterial liquid; the pretreatment filter layer is a hollow sphere filter layer.
The biological filter bed microbial base filler consists of a volcanic rock layer 119, a lower graded mixed filler layer 120, a carbon filler layer 121, an upper graded mixed filler layer 122 and an organic fertilizer filler layer 123 which are sequentially arranged from bottom to top, wherein the lower graded mixed filler layer 120 and the upper graded mixed filler layer 122 comprise the following raw materials in parts by weight: 48 parts of pine bark, 18 parts of volcanic rock, 4.5 parts of shell powder, 9 parts of activated carbon, 9 parts of hollow spheres and 4.5 parts of organic fertilizer.
Wherein the thickness of volcanic layer 119 is 190mm, the thickness of lower graded mixed filler layer 120 is 750mm, the thickness of carbon-locked filler layer 121 is 90mm, and the thickness of upper graded mixed filler layer 122 is 380mm.
Example 3
This embodiment differs from embodiment 1 in that:
and (C) maintaining the temperature of the waste gas subjected to the cooling treatment in the step A at 40 ℃.
The purifying liquid used in the step B is as follows: the purifying liquid used in the step B and the step D is as follows: a plant liquid; the pretreatment filter layer is a hollow sphere filter layer.
The biological filter bed microbial base filler consists of a volcanic rock layer 119, a lower graded mixed filler layer 120, a carbon filler layer 121, an upper graded mixed filler layer 122 and an organic fertilizer filler layer 123 which are sequentially arranged from bottom to top, wherein the lower graded mixed filler layer 120 and the upper graded mixed filler layer 122 comprise the following raw materials in parts by weight: 50 parts of pine bark, 20 parts of volcanic rock, 5 parts of shell powder, 10 parts of activated carbon, 10 parts of hollow spheres and 5 parts of organic fertilizer.
Wherein the thickness of volcanic layer 119 is 200mm, the thickness of lower graded mixed filler layer 120 is 800mm, the thickness of carbon-locked filler layer 121 is 100mm, and the thickness of upper graded mixed filler layer 122 is 400mm.
Example 4
This embodiment differs from embodiment 1 in that:
and (C) maintaining the temperature of the waste gas subjected to the cooling treatment in the step A at 42 ℃.
The purifying liquid used in the step B is as follows: the purifying liquid used in the step B and the step D is as follows: a plant liquid; the pretreatment filter layer is a hollow sphere filter layer.
The biological filter bed microbial base filler consists of a volcanic rock layer 119, a lower graded mixed filler layer 120, a carbon filler layer 121, an upper graded mixed filler layer 122 and an organic fertilizer filler layer 123 which are sequentially arranged from bottom to top, wherein the lower graded mixed filler layer 120 and the upper graded mixed filler layer 122 comprise the following raw materials in parts by weight: 52 parts of pine bark, 22 parts of volcanic rock, 5.5 parts of shell powder, 11 parts of activated carbon, 11 parts of hollow spheres and 5.5 parts of organic fertilizer.
The thickness of volcanic layer 119 is 210mm, the thickness of lower graded mixed filler layer 120 is 850mm, the thickness of carbon-locking filler layer 121 is 110mm, and the thickness of upper graded mixed filler layer 122 is 420mm.
Example 5
This embodiment differs from embodiment 1 in that:
and (C) maintaining the temperature of the waste gas subjected to the cooling treatment in the step A at 45 ℃.
The purifying liquid used in the step B is as follows: the purifying liquid used in the step B and the step D is as follows: an EM bacterial liquid; the pretreatment filter layer is a hollow sphere filter layer.
The biological filter bed microbial base filler consists of a volcanic rock layer 119, a lower graded mixed filler layer 120, a carbon filler layer 121, an upper graded mixed filler layer 122 and an organic fertilizer filler layer 123 which are sequentially arranged from bottom to top, wherein the lower graded mixed filler layer 120 and the upper graded mixed filler layer 122 comprise the following raw materials in parts by weight: 55 parts of pine bark, 25 parts of volcanic rock, 6 parts of shell powder, 12 parts of activated carbon, 12 parts of hollow spheres and 6 parts of organic fertilizer.
The thickness of volcanic layer 119 is 220mm, the thickness of lower graded mixed filler layer 120 is 900mm, the thickness of carbon-locking filler layer 121 is 120mm, and the thickness of upper graded mixed filler layer 122 is 450mm.
The above embodiments are preferred embodiments of the present invention, and besides, the present invention may be implemented in other ways, and any obvious substitution is within the scope of the present invention without departing from the concept of the present invention.

Claims (3)

1. A high-temperature waste gas purifying treatment method is characterized in that: the method comprises the following steps: A. and (3) cooling treatment of waste gas: using heat
The exchanger carries out cooling treatment on the waste gas; B. pretreatment of waste gas: spraying the purified liquid to pre-treat the filter layer for cooling treatment
Waste gas is filtered and purified; C. and (3) secondary purification treatment: b, spraying purification treatment spray to the waste gas flowing out of the step B, and performing secondary purification treatment on the waste gas by the purification treatment spray; D. biological purification treatment: c, spraying a purifying liquid on the microbial base filler layer, and performing biological purification treatment on the waste gas treated in the step C through the microbial base filler layer, wherein the microbial base filler layer comprises a volcanic layer, a lower graded mixed filler layer, a carbon filler layer, an upper graded mixed filler layer and an organic fertilizer filler layer which are sequentially arranged from bottom to top, and the lower graded mixed filler layer and the upper graded mixed filler layer comprise the following raw materials in parts by weight: 45-55 parts of pine bark, 15-25 parts of volcanic rock, 4-6 parts of shell powder, 8-12 parts of activated carbon, 8-12 parts of hollow spheres and 4-6 parts of organic fertilizer; the thickness of the volcanic rock layer is 180-220mm, the thickness of the lower graded mixed filler layer is 700-900mm, the thickness of the carbon filler layer is 80-120mm, and the thickness of the upper graded mixed filler layer is 350-450mm;
the high-temperature waste gas purification treatment method is carried out by using high-temperature waste gas purification equipment;
the high-temperature exhaust gas purifying apparatus:
the device comprises a biological filter bed, a heat exchanger arranged at the air inlet end of the biological filter bed and used for cooling waste gas, an exhaust unit arranged at the air outlet end of the biological filter bed, and a chimney arranged at the air outlet end of the exhaust unit;
the biological filter bed comprises a box body and two groups of filter components which are respectively arranged at the upper half part and the lower half part of the box body, the filter components comprise a pretreatment filter layer and a microorganism base filler layer, the pretreatment filter layer is positioned at the left side of the microorganism base filler layer, a baffle plate is arranged between the pretreatment filter layer and the microorganism base filler layer, a gas distribution cavity is formed between the two pretreatment filter layers, a gas guide cavity is formed between the two microorganism base filler layers, the gas distribution cavity is communicated with the gas guide cavity, an upper gas inlet and a side gas inlet are formed in the box body, and both the upper gas inlet and the side gas inlet are communicated with the gas outlet end of the heat exchanger;
an upper air inlet channel is formed between the upper air inlet and a pretreatment filter layer positioned at the upper half part of the box body, a lower air inlet channel is formed between the side air inlet and the pretreatment filter layer positioned at the lower half part of the box body, an upper air outlet channel is formed between a microorganism base packing layer positioned at the upper half part of the box body and the box body, a lower air outlet channel is formed between the microorganism base packing layer positioned at the lower half part of the box body and the box body, a deep treatment spray layer is arranged in the upper air outlet channel, and an intermediate treatment spray layer is arranged in the air guide cavity;
the upper air inlet channel and the air distribution cavity are internally provided with a pretreatment spray layer for spraying treatment liquid for purifying waste gas, the pretreatment spray layer is formed by horizontally and uniformly distributing a plurality of nozzles, and the distance between two adjacent nozzles in the pretreatment spray layer is 45-55cm; the advanced treatment spraying layer in the upper exhaust passage is a single layer, the advanced treatment spraying layer is formed by horizontally and uniformly distributing a plurality of spray heads, and the intermediate treatment spraying layer is formed by a plurality of spray heads for spraying the purifying liquid.
2. The high-temperature exhaust gas purification treatment method according to claim 1, characterized in that: the temperature in the step A is reduced
The temperature of the treated exhaust gas is kept at 35-45 ℃.
3. The high-temperature exhaust gas purification treatment method according to claim 1, characterized in that: said steps B and D
The purifying liquid used in the method is as follows: plant fluid or EM bacteria fluid; the pretreatment filter layer is a hollow sphere filter layer.
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CN112915772B (en) * 2021-02-08 2022-11-22 朗昆（北京）新环保科技有限公司 Nitrifying bacteria colony, biological filter bed, device and method for treating waste gas containing HCN
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