CN111484223A - Sludge treatment method and sludge treatment system for manufacturing anti-hardening ecological nutrient soil - Google Patents
Sludge treatment method and sludge treatment system for manufacturing anti-hardening ecological nutrient soil Download PDFInfo
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- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 11
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- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 2
- 241000006382 Bacillus halodurans Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 241000208152 Geranium Species 0.000 description 2
- 108090000288 Glycoproteins Proteins 0.000 description 2
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- 241000205062 Halobacterium Species 0.000 description 1
- MSFSPUZXLOGKHJ-UHFFFAOYSA-N Muraminsaeure Natural products OC(=O)C(C)OC1C(N)C(O)OC(CO)C1O MSFSPUZXLOGKHJ-UHFFFAOYSA-N 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
- A01G24/25—Dry fruit hulls or husks, e.g. chaff or coir
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
- A01G24/27—Pulp, e.g. bagasse
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/28—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing peat, moss or sphagnum
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of waste treatment, in particular to a sludge treatment method and a sludge treatment system for manufacturing anti-hardening ecological nutrient soil. The invention adds ingredients including soil bulking agent and sludge heavy metal passivation adsorbent into sludge raw material, the sludge raw material and the ingredients are uniformly mixed in a proportioning tank to obtain sludge material, then the sludge material is conveyed to a raw material bin, the sludge material entering the raw material bin is extruded into a sheet shape by a discharging mechanism at the bottom of the raw material bin and then the sheet-shaped sludge material is output, then the sludge material is subjected to microwave decomposition, and the sludge material subjected to microwave decomposition is subjected to heat superposition to remove water, thus obtaining the sludge material with water content suitable for biological treatment. According to the invention, the soil leavening agent and the sludge heavy metal passivation adsorbent are added in the sludge treatment process, so that the sludge is prevented from hardening in the treatment process, meanwhile, the soil leavening agent can make the sludge become fluffy, and the sludge heavy metal passivation adsorbent can adsorb heavy metals in the sludge.
Description
Technical Field
The invention relates to the technical field of waste treatment, in particular to a sludge treatment method and a sludge treatment system for manufacturing anti-hardening ecological nutrient soil.
Background
In order to solve the problem, the prior art also discloses a plurality of technical schemes for reusing the sludge, but when the step of sludge dehydration is carried out in domestic water treatment,
generally, cationic polyacrylamide, namely sodium acrylate, is used as a flocculating agent, so a large amount of sodium acrylate exists in sludge, and in the sludge treatment process, the sodium ions in the flocculating agent lose moisture in soil under the action of polarity, and form compact insoluble phosphate under the action of cohesion, so that the soil aggregate structure is damaged, the soil is hardened, and the sludge is not beneficial to recycling.
For example, the chinese patent application discloses a method and apparatus for preparing a novel ecological culture medium using municipal waste [ application number: 201510133600.X ], the invention application provides a method for preparing a novel ecological culture medium by using urban waste, which comprises the following steps: a. mechanically crushing garden waste with the water content of 10-35% to the particle size of less than or equal to 3cm, and stirring and mixing the garden waste with the urban domestic sludge which is dried and then sheared to obtain a mixed raw material; the water content of the dried municipal domestic sludge is 60-90%, and the mass ratio of the municipal domestic sludge to garden waste is 1: 0.3-2; b. sending the mixed raw material into a steam explosion tank for steam explosion treatment, controlling the temperature in the steam explosion tank to be 180-260 ℃, the pressure to be 0.8-2.6 MPa, and keeping the temperature and the pressure for 10-20 min; cooling the material after the steam explosion treatment to 50-65 ℃; cooling the treated material and recovering the waste heat to obtain hot air; c. adding aerobic fermentation bacteria accounting for 0.2-0.5% of the cooled material as an inoculant to carry out aerobic fermentation, introducing hot air to keep the temperature required by fermentation, controlling the fermentation temperature to be 55-65 ℃, and fermenting for 5-10 days; the inoculant is an aerobic fermentation inoculant; d. and screening, drying and granulating the fermented material to obtain the ecological culture medium.
The invention application, although providing a set of equipment to achieve the conversion of municipal waste into an ecological cultivation substrate, does not solve the above problems.
Disclosure of Invention
The invention aims to solve the problems and provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, which can prevent soil hardening.
Another object of the present invention is to provide a sludge treatment system for implementing a sludge treatment method for manufacturing anti-hardening eco-nutritional soil that can prevent soil hardening, in view of the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sludge treatment method for manufacturing anti-hardening ecological nutrient soil is characterized in that ingredients including a soil bulking agent and a sludge heavy metal passivation adsorbent are added into a sludge raw material, the sludge raw material and the ingredients are uniformly mixed in a mixing tank (1) to obtain a sludge material, then the sludge material is conveyed to a raw material bin (2), the sludge material entering the raw material bin (2) is extruded into a sheet shape by a discharging mechanism (3) at the bottom of the raw material bin (2), the sheet-shaped sludge material is output, then the sludge material is subjected to microwave decomposition, and the sludge material subjected to microwave decomposition is subjected to heat superposition to remove water, so that the sludge material with water content suitable for biological treatment is obtained; the sludge raw material is sludge obtained after being treated by a flocculating agent, the soil leavening agent is used for loosening the sludge raw material, the sludge heavy metal passivation adsorbent is used for adsorbing heavy metals in the sludge raw material, and the soil leavening agent and/or the sludge heavy metal passivation adsorbent can reduce or eliminate the hardening phenomenon of the sludge raw material.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, the mass of the soil bulking agent is 1-5% of the mass of the sludge raw material; the soil leavening agent comprises 20-40 parts by weight of crushed corn straws, 10-20 parts by weight of crude coconut coir, 10-15 parts by weight of ammonium bicarbonate, 1-3 parts by weight of calcium oxide and 5-15 parts by weight of hydroxypropyl cellulose; the mass of the sludge heavy metal passivation adsorbent is 1-5% of the mass of the sludge raw material; the sludge heavy metal passivation adsorbent comprises 2-6 parts by weight of Halobacterium jilantaiense, 5-20 parts by weight of aspartic acid, 5-20 parts by weight of glutamic acid and 6-18 parts by weight of EDTA.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, the mass of the soil bulking agent is 3% of the mass of the sludge raw material; the soil leavening agent comprises 30 parts of crushed corn straws, 15 parts of crude coconut coir, 12 parts of ammonium bicarbonate, 2 parts of calcium oxide and 10 parts of hydroxypropyl cellulose by mass; the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material; the sludge heavy metal passivation adsorbent comprises 4 parts of halophilus giraldii, 13 parts of aspartic acid, 13 parts of glutamic acid and 12 parts of EDTA (ethylene diamine tetraacetic acid) in parts by mass.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, the ingredients also comprise 3-8 parts by mass of ammonium dodecyl sulfate and 3-8 parts by mass of oxidant; when the ingredients are added into the sludge, the soil swelling agent is added, the ammonium dodecyl sulfate is added, the sludge heavy metal passivation adsorbent is added, and the oxidant is added.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, the ammonium dodecyl sulfate is 5 parts by mass, and the oxidant is 5 parts by mass.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, the water content of the sludge raw material is 70-90%, and the water content of the sludge material with the water content suitable for biological treatment is 40-50%.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, microwave decomposition is carried out in the closed box body, microwave decomposition is carried out in a transmission process by adopting microwave decomposition transmission belts which are sequentially connected from top to bottom end, a wind power circulation system is connected to the closed box body so as to lead hot gas with water vapor generated in the microwave decomposition process out of the upper part of the closed box body, the hot gas is cooled by a heat exchanger of the wind power circulation system and then is conveyed to a compressor of the wind power circulation system, the air flow is heated and then is returned into the closed box body from the lower part of the closed box body, condensed water obtained by the heat exchanger of the wind power circulation system is discharged out of the closed box body, and high-grade oxidation is simultaneously realized under the action of an oxidant in the microwave decomposition process so as to mineralize organic matters.
In the sludge treatment method for manufacturing the anti-hardening ecological nutrient soil, the sludge materials subjected to microwave decomposition are conveyed to a heat stacking material conveying belt positioned below a microwave decomposition conveying belt in a closed box body, the heat stacking material conveying belt is used for receiving the sludge materials output by the microwave decomposition conveying belt, air flow heated by a compressor of a wind power circulation system enters the closed box body from the lower part of the heat stacking material conveying belt, the sludge materials are subjected to heat stacking in the conveying process, the heat stacking temperature of the sludge materials is 90-110 ℃, water vapor generated in the heat stacking process is upwards conveyed by the air flow and is led out from the upper part of the closed box body through the microwave decomposition conveying belt, and pasteurization is performed in the heat stacking water removing process.
A sludge treatment system adopting the method for treating sludge for manufacturing anti-hardening ecological nutrient soil comprises a batching tank, wherein a batching stirring mechanism is arranged in the batching tank, a raw material bin is connected to an outlet of the batching tank, a discharging mechanism is arranged at the bottom of the raw material bin, the discharging end of the discharging mechanism is connected with a closed box body, a plurality of microwave decomposition conveying belts which are sequentially connected from top to bottom are arranged in the closed box body, one end of the uppermost microwave decomposition conveying belt is positioned under the discharging end of the discharging mechanism, a heat overlapping material conveying belt is arranged under the lowermost microwave decomposition conveying belt, a microwave generating device which is positioned at the periphery of the microwave decomposition conveying belt is arranged in the closed box body, a wind power circulation system is connected onto the closed box body, and an air inlet of the wind power circulation system is positioned at the upper part of the closed box, and an air outlet of the wind power circulating system is positioned at the lower part of the closed box body and below the microwave decomposition transmission belt.
In the sludge treatment system, the wind power circulation system comprises a closed side box, the upper part and the lower part of the closed side box are communicated with the upper part and the lower part of a closed box body respectively, a heat exchanger is arranged at the upper part of the closed side box, a filter screen and a condensate water discharge pipe are arranged below the heat exchanger, a compressor is arranged at the lower part of the closed side box, and the compressor is connected with the lower part of the closed box body; the discharging mechanism comprises at least two spiral discharging rods which are arranged adjacently in parallel, and a plurality of convex points are respectively arranged on the threads of the spiral discharging rods so that a plurality of vent holes are distributed on the flaky sludge material.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the soil leavening agent and the sludge heavy metal passivation adsorbent are added in the sludge treatment process, so that the sludge material is prevented from hardening in the treatment process, meanwhile, the sludge raw material can become fluffy by the soil leavening agent, and the sludge heavy metal passivation adsorbent can adsorb heavy metals in the sludge raw material.
2. The heavy metal passivation adsorbent for sludge comprises the halophilic bacillus gibsonii, and the halophilic bacillus gibsonii can specifically adsorb sodium ions on the outer surface of a cell wall, so that the hardening phenomenon of sludge materials in the treatment process is further avoided.
3. The invention has simple and reliable structure, can recycle the waste gas after drying the sludge material and has lower energy consumption.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic diagram of microwave decomposition and stacked heat water removal;
in the figure: batching jar 1, former feed bin 2, discharge mechanism 3, closed box 4, little wavelength decomposition transmission band 5, wind-force circulation system 6, heat exchanger 7, compressor 8, fold hot material transmission band 9, drainage fan 10, batching rabbling mechanism 11, spiral discharge rod 31, bump 32, ventilation hole 41, closed side case 61, comdenstion water discharge pipe 62, filter screen 63.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 90%, the mass of the soil leavening agent is 1% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 5% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to heat superposition to remove water to obtain the sludge material with the water content of 40%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil bulking agent comprises 20 parts by mass of crushed corn straws, 20 parts by mass of crude coconut husk, 15 parts by mass of ammonium bicarbonate, 3 parts by mass of calcium oxide and 15 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises 2 parts by weight of Geranium altophilum, 20 parts by weight of aspartic acid, 20 parts by weight of glutamic acid and 18 parts by weight of EDTA, and when ingredients are added, the soil leavening agent and the sludge heavy metal passivation adsorbent are mixed and then added into the sludge raw material.
The calcium oxide generates calcium hydroxide after meeting water and emits heat, and the heat can decompose ammonium bicarbonate to generate gas, so that the porosity of the soil is improved.
Hydroxypropyl cellulose, abbreviated as HPC, is a white or pale yellow powder, tasteless, and flammable. The soil expanding agent is insoluble in benzene and ether at normal temperature, can absorb water and swell when meeting water, and can maintain the gaps in the soil by matching with crushed corn straws and crude coconut coir in the soil expanding agent.
The bacillus halodurans (Halobacterium jilantaiense) AC3 CGMCC No.1594 belongs to the halophilus, the cell wall of the bacillus halodurans replaces the traditional peptidoglycan with glycoprotein, and the glycoprotein contains high-content acidic amino acid to form a negative charge region, so that sodium ions with positive charges can be attracted, the stability of the cell wall is maintained, and the cells are prevented from being cracked, so that the sodium ions can be adsorbed on the outer surface of the cell wall, and the hardening phenomenon of sludge in the treatment process is further avoided.
EDTA is ethylenediamine tetraacetic acid (CAS number: 60-00-4), and its chemical formula is C10H16N2O8White powder at normal temperature and pressure. It is a compound capable of reacting with Mg2+、Ca2+、 Mn2+、Fe2+The chelating agent combined with the divalent metal ions can form stable chelate with the heavy metal ions, thereby reducing the concentration of free heavy metal ions in the sludge.
Example 2
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 70%, the mass of the soil leavening agent is 5% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 1% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to heat superposition to remove water to obtain the sludge material with the water content of 50%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil bulking agent comprises 40 parts by mass of crushed corn straws, 10 parts by mass of crude coconut husk, 10 parts by mass of ammonium bicarbonate, 1 part by mass of calcium oxide and 5 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises 6 parts of Geranium altaicinoid bacteria, 5 parts of aspartic acid, 5 parts of glutamic acid and 6 parts of EDTA in parts by weight, and when ingredients are added, the soil leavening agent and the sludge heavy metal passivation adsorbent are mixed and then added into the sludge raw material.
Example 3
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 80%, the mass of the soil leavening agent is 3% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by using a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to superposition heat dehydration to obtain the sludge material with the water content of 45%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil bulking agent comprises 30 parts by mass of crushed corn straws, 15 parts by mass of crude coconut husk, 12 parts by mass of ammonium bicarbonate, 2 parts by mass of calcium oxide and 10 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises 4 parts of halotolerant bacillus gibsonii, 13 parts of aspartic acid, 13 parts of glutamic acid and 12 parts of EDTA (ethylene diamine tetraacetic acid) in parts by mass, and when ingredients are added, the soil leavening agent and the sludge heavy metal passivation adsorbent are mixed and then added into the sludge raw material.
Example 4
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 80%, the mass of the soil leavening agent is 3% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by using a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to superposition heat dehydration to obtain the sludge material with the water content of 45%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil raising agent comprises 30 parts by mass of crushed corn straws, 15 parts by mass of crude coconut husk, 12 parts by mass of ammonium bicarbonate, 2 parts by mass of calcium oxide and 10 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises 4 parts by mass of halophilic bacillus gibsonii, 13 parts by mass of aspartic acid, 13 parts by mass of glutamic acid and 12 parts by mass of EDTA, wherein the mass part of ammonium lauryl sulfate is 3 parts, the mass part of oxidant is 8 parts, and when ingredients are added, the soil leavening agent, the sludge heavy metal passivation adsorbent, the ammonium lauryl sulfate and the oxidant are mixed and then added into the sludge raw material. The oxidant can be 5% hydrogen peroxide by mass, so that the hydrogen peroxide is heated and decomposed during heat superposition water removal, and the method is green and environment-friendly.
Ammonium dodecyl sulfate (CAS number: 2235-54-3) for regulating pH value of sludge and ensuring that Halobacterium jilantaiensis has good growth environment.
Referring to fig. 1 and 2, the microwave decomposition can be realized by using a microwave decomposition conveyor belt 5 connected from top to bottom in sequence to decompose the organic substances in the sludge material in a transmission process, a wind power circulation system 6 is connected to the closed box 4 to lead out the hot gas with water vapor generated in the microwave decomposition process from the upper part of the closed box 4, cool the hot gas by a heat exchanger 7 of the wind power circulation system 6, convey the air flow to a compressor 8 of the wind power circulation system 6 to be heated and then return the lower part of the closed box 4 to the closed box 4, discharge the condensed water obtained by the heat exchanger 7 of the wind power circulation system 6 out of the closed box 4, and realize advanced oxidation under the action of an oxidant in the microwave decomposition process to mineralize the organic substances in the sludge material, oxidizing the sludge with oxidant to eliminate organic matter and reduce organic matter pollution.
When the device is used, sludge materials are transported on the microwave decomposition conveyor belt 5, the wind power circulation system 6 sends high-temperature dry gas to the bottom of the closed box body 4, the high-temperature dry gas is contacted with the sludge materials to take away water to form low-temperature damp-heat gas, the low-temperature damp-heat gas is condensed and dried by the heat exchanger 7 of the wind power circulation system 6, condensed water is separated, the condensed water is compressed and heated by the compressor 8 and then is sent to the bottom of the closed box body 4 again to complete a cycle, so the device has a simple and reliable structure, waste gas after sludge drying can be recycled, and energy consumption.
The heat-stacking dewatering can be realized by adopting the following specific mode, sludge materials subjected to microwave decomposition are transmitted to a heat-stacking material transmission belt 9 positioned below a microwave decomposition transmission belt 5 in a closed box body 4, the heat-stacking material transmission belt 9 is used for receiving the sludge materials output by the microwave decomposition transmission belt 5, air flow heated by a compressor 8 of a wind power circulating system 6 enters the closed box body 4 from the lower part of the heat-stacking material transmission belt 9, and thus a heat-stacking material transmission belt 9 is arranged below the microwave decomposition transmission belt 5, so that heat-stacking dewatering is realized in the sludge materials in the transmission process, the dewatering effect on the sludge is improved, the heat-stacking temperature of the sludge materials can be selected in a temperature range of 90-110 ℃, and water vapor generated in the heat-stacking process is upwards transmitted by the air flow and is led out from the upper part of the closed box body 4 through the microwave decomposition transmission belt 5, and pasteurizing in a heat-cascade water removal process.
Example 5
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 80%, the mass of the soil leavening agent is 3% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to heat superposition to remove water to obtain the sludge material with the water content of 50%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil raising agent comprises 30 parts by mass of crushed corn straws, 15 parts by mass of crude coconut husk, 12 parts by mass of ammonium bicarbonate, 2 parts by mass of calcium oxide and 10 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises, by mass, 4 parts of halophilic bacillus gibsonii, 13 parts of aspartic acid, 13 parts of glutamic acid and 12 parts of EDTA, wherein the mass part of ammonium lauryl sulfate is 8 parts, the mass part of the oxidant is 3 parts, and when ingredients are added, the soil leavening agent, the sludge heavy metal passivation adsorbent, the ammonium lauryl sulfate and the oxidant are mixed and then added into a sludge raw material.
Example 6
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 80%, the mass of the soil leavening agent is 3% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by using a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to superposition heat dehydration to obtain the sludge material with the water content of 45%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil raising agent comprises 30 parts by mass of crushed corn straws, 15 parts by mass of crude coconut husk, 12 parts by mass of ammonium bicarbonate, 2 parts by mass of calcium oxide and 10 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises, by mass, 4 parts of halophilic bacillus gibsonii, 13 parts of aspartic acid, 13 parts of glutamic acid and 12 parts of EDTA, 5 parts of ammonium lauryl sulfate and 5 parts of an oxidant, and when ingredients are added, the soil leavening agent, the sludge heavy metal passivation adsorbent, the ammonium lauryl sulfate and the oxidant are mixed and then added into a sludge raw material.
Example 7
The embodiment provides a sludge treatment method for manufacturing anti-hardening ecological nutrient soil, ingredients including a soil leavening agent and a sludge heavy metal passivation adsorbent are added into sludge with the humidity of 80%, the mass of the soil leavening agent is 3% of that of a sludge raw material, the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material, the sludge and the ingredients are uniformly mixed in a mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then output to the sheet-shaped sludge material, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by using a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to superposition heat dehydration to obtain the sludge material with the water content of 45%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
The soil raising agent comprises 30 parts by mass of crushed corn straws, 15 parts by mass of crude coconut husk, 12 parts by mass of ammonium bicarbonate, 2 parts by mass of calcium oxide and 10 parts by mass of hydroxypropyl cellulose; the sludge heavy metal passivation adsorbent comprises, by mass, 4 parts of halophilic bacillus gibsonii, 13 parts of aspartic acid, 13 parts of glutamic acid and 12 parts of EDTA, 5 parts of ammonium lauryl sulfate and 5 parts of an oxidant, wherein when ingredients are added, a soil leavening agent is added into a sludge raw material, then the ammonium lauryl sulfate is added, then the sludge heavy metal passivation adsorbent is added, and finally the oxidant is added.
Example 8
The embodiment provides a sludge treatment system for manufacturing anti-hardening ecological nutrient soil, which is shown by combining a figure 1 and a figure 2 and comprises a batching tank 1, wherein a batching stirring mechanism 11 is arranged in the batching tank 1, a raw material bin 2 is connected to an outlet of the batching tank 1, a discharging mechanism 3 is arranged at the bottom of the raw material bin 2, the discharging end of the discharging mechanism 3 is connected with a closed box body 4, a plurality of microwave decomposition transmission belts 5 which are sequentially connected from top to bottom are arranged in the closed box body 4, one end of the uppermost microwave decomposition transmission belt 5 is positioned right below the discharging end of the discharging mechanism 3, a stacked thermal material transmission belt 9 is arranged below the lowermost microwave decomposition transmission belt 5, and a microwave generating device positioned at the periphery of the microwave decomposition transmission belt 5 is arranged in the closed box body 4, so that sludge materials are subjected to microwave decomposition while being conveyed by the microwave decomposition transmission belt 5, the closed box body 4 is connected with a wind power circulating system 6, an air inlet of the wind power circulating system 6 is positioned at the upper part of the closed box body 4, and an air outlet of the wind power circulating system 6 is positioned at the lower part of the closed box body 4 and below the microwave decomposition conveying belt 5.
When the device is used, sludge raw materials and ingredients are added into the ingredient tank 1, the ingredient stirring mechanism 11 is started to stir uniformly and then is transferred to the raw material bin 2, the sludge raw materials are extruded into a sheet shape through the discharging mechanism 3 at the bottom of the raw material bin 2 and then are output into the closed box 4, the sludge materials are transported on the microwave decomposition conveying belt 5, the high-temperature drying gas is sent to the bottom of the closed box 4 through the wind power circulating system 6, the high-temperature drying gas is contacted with the sludge materials and then takes away water to become low-temperature damp-heat gas, the low-temperature damp-heat gas is condensed and dried through the heat exchanger 7 of the wind power circulating system 6, condensed water is separated, the condensed water is compressed and heated through the compressor 8 and then is sent to the bottom of the closed box 4 again to complete a cycle, and therefore the.
Specifically, the wind power circulation system 6 comprises a closed side box 61, the upper part and the lower part of the closed side box 61 are respectively communicated with the upper part and the lower part of the closed box 4, a heat exchanger 7 is arranged at the upper part of the closed side box 61, a filter screen 63 and a condensed water discharge pipe 62 are arranged below the heat exchanger 7, the filter screen 63 filters and removes soil particles wrapped by gas, the condensed water discharge pipe 62 discharges condensed water, a compressor 8 is arranged at the lower part of the closed side box 61, and the compressor 8 is connected with the lower part of the closed box 4; the discharging mechanism 3 comprises at least two spiral discharging rods 31 which are arranged in parallel and adjacently, the spiral discharging rods 31 extrude the uniformly mixed sludge raw materials into sheet-shaped sludge materials, and a plurality of salient points 32 are respectively arranged on threads of the spiral discharging rods 31 so that a plurality of vent holes are distributed on the sheet-shaped sludge materials, and the air permeability and the fluffiness of the sludge materials are improved.
Preferably, be equipped with a plurality of ventilation holes 41 that are located the lateral wall of closed box 4 between the adjacent microwave decomposition transmission band 5 from top to bottom, ventilation hole 41 one end and closed box 4 intercommunication, the other end and closed side case 61 intercommunication are equipped with the drainage fan 10 that introduces the air current in the closed box 4 into the heat exchanger 7 department in the closed side case 61 respectively in each ventilation hole 41, and drainage fan 10 can improve the degree of intercommunication between closed box 4 and the closed side case 61, guarantees the fluency of gas circulation process.
The working principle of the invention is as follows: when the device is used, a sludge raw material and ingredients are added into the ingredient tank 1, the ingredient stirring mechanism 11 is started to stir uniformly and then transfer the sludge raw material to the raw material bin 2, the sludge raw material is extruded into a sheet shape through the spiral discharging rod 31 at the bottom of the raw material bin 2 and then output the sheet-shaped sludge material into the closed box 4, the sludge material is transported on the microwave decomposition transmission belt 5, the sludge material sequentially passes through the microwave decomposition transmission belt 5 and the overlapped heat material transmission belt 9, in the transmission process, high-temperature dry gas compressed by the compressor 8 is sent to the bottom of the closed box 4, the high-temperature dry gas is sequentially contacted with the overlapped heat material transmission belt 9 and the sludge material on the microwave decomposition transmission belt 5 and then takes away water to become low-temperature damp-hot gas, the low-temperature damp-hot gas is drained into the closed side box 61 through the drainage fan 10 in the, the separated condensed water is discharged from the condensed water discharge pipe 62, the gas is filtered by the filter screen 63, then enters the compressor 8 again for compression and heating, and then is sent to the bottom of the closed box 4 again to complete a cycle, so the invention has simple and reliable structure, the waste gas after drying the sludge material can be recycled, and the energy consumption is lower.
Comparative example 1
The comparative example provides a method for treating sludge for manufacturing anti-hardening ecological nutrient soil, wherein a commercially available soil bulking agent is added into sludge with the humidity of 80% to serve as a material, the mass of the soil bulking agent is 3% of the mass of a sludge raw material, the sludge and the material are uniformly mixed in a material mixing tank 1 and then conveyed to a raw material bin 2, the sludge material entering the raw material bin 2 is extruded into a sheet shape by a discharging mechanism 3 at the bottom of the raw material bin 2 and then the sheet-shaped sludge material is output, then the sludge material is subjected to microwave decomposition, the microwave decomposition can be realized by a microwave generating device in the prior art, and the sludge material subjected to microwave decomposition is subjected to heat superposition to remove water to obtain the sludge material with the water content of 45%; the sludge raw material is sludge obtained after being treated by a flocculating agent.
Application example 1
Taking the same batch of sludge raw materials, evenly dividing the sludge raw materials into 4 parts of A, B, C and D with equal mass, and preparing a sludge material 1 from the sludge of the A part by the sludge treatment method described in the comparative example 1 and the sludge treatment system described in the embodiment 8;
b part of the sludge was treated by the sludge treatment method described in example 3, and a sludge material 2 was prepared by the sludge treatment system described in example 8;
the third sludge was treated by the sludge treatment method described in example 6, and the sludge treatment system described in example 8 was used to prepare a sludge material 3;
the sludge material 4 was prepared from the butane sludge by the sludge treatment method described in example 7 and by the sludge treatment system described in example 8;
then, the sludge material 1, the sludge material 2, the sludge material 3 and the sludge material 4 are dried, fermented and cured under the same conditions to obtain soil 1, soil 2, soil 3 and soil 4 respectively, the soil appearance is observed, and the soil compactness instrument produced by the Hangzhou android electronics limited company is used for measuring the maximum pressure in the soil 1, the soil 2, the soil 3 and the soil 4 respectively, and the results are shown in the following table:
and (4) analyzing results: from the experimental results in the table, it can be seen that the maximum pressure of the soil 1 is significantly higher than that of the soil 2-4, that is, the compactness of the soil 1 is the highest, and a certain hardening phenomenon on the surface of the soil 1 can be observed from the appearance, so that the sludge treatment method provided by the invention has a better effect of preventing the soil from hardening, and the expected purpose of the invention is achieved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms of the dosage vessel 1, the raw material bin 2, the discharging mechanism 3, the closed box 4, the microwave decomposition conveyor belt 5, the wind circulating system 6, the heat exchanger 7, the compressor 8, the heat accumulation conveyor belt 9, the draft fan 10, the dosage stirring mechanism 11, the screw discharging rod 31, the convex points 32, the vent holes 41, the closed side box 61, the condensed water discharging pipe 62, the filter screen 63, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A sludge treatment method for manufacturing anti-hardening ecological nutrient soil is characterized in that: adding ingredients including a soil bulking agent and a sludge heavy metal passivation adsorbent into a sludge raw material, uniformly mixing the sludge raw material and the ingredients in a mixing tank (1) to obtain a sludge material, conveying the sludge material to a raw material bin (2), extruding the sludge material entering the raw material bin (2) into a sheet shape by a discharging mechanism (3) at the bottom of the raw material bin (2), outputting the sheet-shaped sludge material, performing microwave decomposition on the sludge material, and performing heat superposition dewatering on the sludge material subjected to microwave decomposition to obtain a sludge material with a water content suitable for biological treatment; the sludge raw material is sludge obtained after being treated by a flocculating agent, the soil leavening agent is used for loosening the sludge raw material, the sludge heavy metal passivation adsorbent is used for adsorbing heavy metals in the sludge raw material, and the soil leavening agent and/or the sludge heavy metal passivation adsorbent can reduce or eliminate the hardening phenomenon of the sludge material.
2. The sludge treatment method for manufacturing the hardening-prevention ecological nutrient soil according to claim 1, wherein: the mass of the soil leavening agent is 1-5% of that of the sludge raw material; the soil leavening agent comprises 20-40 parts by weight of crushed corn straws, 10-20 parts by weight of crude coconut coir, 10-15 parts by weight of ammonium bicarbonate, 1-3 parts by weight of calcium oxide and 5-15 parts by weight of hydroxypropyl cellulose; the mass of the sludge heavy metal passivation adsorbent is 1-5% of the mass of the sludge raw material; the sludge heavy metal passivation adsorbent comprises 2-6 parts by weight of halophilus jilanthii, 5-20 parts by weight of aspartic acid, 5-20 parts by weight of glutamic acid and 6-18 parts by weight of EDTA.
3. The sludge treatment method for manufacturing the hardening-prevention ecological nutrient soil according to claim 2, wherein: the mass of the soil leavening agent is 3% of that of the sludge raw material; the soil raising agent comprises 30 parts by mass of crushed corn straws, 15 parts by mass of crude coconut coir, 12 parts by mass of ammonium bicarbonate, 2 parts by mass of calcium oxide and 10 parts by mass of hydroxypropyl cellulose; the mass of the sludge heavy metal passivation adsorbent is 3% of that of the sludge raw material; the sludge heavy metal passivation adsorbent comprises, by mass, 4 parts of halophilus jilantii, 13 parts of aspartic acid, 13 parts of glutamic acid and 12 parts of EDTA.
4. The sludge treatment method for manufacturing the hardening-prevention ecological nutrient soil according to claim 3, wherein: the ingredients also comprise 3-8 parts of ammonium dodecyl sulfate and 3-8 parts of oxidant by mass; when the ingredients are added into the sludge, the soil swelling agent is added, the ammonium dodecyl sulfate is added, the sludge heavy metal passivation adsorbent is added, and the oxidant is added.
5. The sludge treatment method for manufacturing the anti-hardening ecological nutrient soil according to claim 4, wherein: the ammonium dodecyl sulfate is 5 parts by mass, and the oxidant is 5 parts by mass.
6. The sludge treatment method for manufacturing the hardening-prevention eco-nutritional soil according to any one of claims 1 to 5, wherein: the water content of the sludge raw material is 70-90%, and the water content of the sludge material suitable for biological treatment is 40-50%.
7. The sludge treatment method for manufacturing the anti-hardening ecological nutrient soil according to claim 6, wherein: the microwave decomposition is carried out in a closed box body (4) and microwave decomposition is carried out in the transmission process by adopting microwave decomposition transmission belts (5) which are sequentially connected from top to bottom end to end, the closed box body (4) is connected with a wind power circulating system (6) to lead hot gas with water vapor generated in the microwave decomposition process out from the upper part of the closed box body (4), the hot gas is cooled by a heat exchanger (7) of the wind power circulating system (6) and then the air flow is conveyed to a compressor (8) of the wind power circulating system (6) to be heated and then returned to the closed box body (4) from the lower part of the closed box body (4), and the condensed water obtained by the heat exchanger (7) of the wind power circulating system (6) is discharged out of the closed box body (4), in the microwave decomposition process, under the action of an oxidant, high-grade oxidation is simultaneously realized so as to mineralize organic matters in the sludge material.
8. The sludge treatment method for manufacturing anti-hardening ecological nutrient soil according to claim 7, wherein: the sludge material after microwave decomposition is transmitted to a stacked hot material transmission belt (9) which is positioned below a microwave decomposition transmission belt (5) in a closed box body (4), the stacked hot material transmission belt (9) is used for receiving the sludge material output by the microwave decomposition transmission belt (5), the air flow heated by a compressor (8) of a wind power circulation system (6) enters the closed box body (4) from the lower part of the stacked hot material transmission belt (9), the sludge material is stacked in the transmission process, the stacked hot temperature of the sludge material is 90-110 ℃, the water vapor generated in the stacked hot process is upwards transmitted by the air flow and is led out from the upper part of the closed box body (4) through the microwave decomposition transmission belt (5), and pasteurization is carried out in the stacked hot water removal process.
9. A sludge treatment system using the sludge treatment method for manufacturing a hardening-preventive eco-nutritional soil according to any one of claims 1 to 8, characterized in that: comprises a batching tank (1), a batching stirring mechanism (11) is arranged in the batching tank (1), a raw material bin (2) is connected with an outlet of the batching tank (1), a discharging mechanism (3) is arranged at the bottom of the raw material bin (2), the discharging end of the discharging mechanism (3) is connected with a closed box body (4), a plurality of microwave decomposition transmission belts (5) which are sequentially connected from top to bottom are arranged in the closed box body (4), one end of the uppermost microwave decomposition transmission belt (5) is positioned under the discharging end of the discharging mechanism (3), a heat overlapping material transmission belt (9) is arranged below the lowermost microwave decomposition transmission belt (5), a microwave generating device which is positioned at the periphery of the microwave decomposition transmission belts (5) is arranged in the closed box body (4), a wind power circulation system (6) is connected on the closed box body (4), and an air inlet of the wind power circulation system (6) is positioned at the upper part of the closed box body, and the air outlet of the wind power circulating system (6) is positioned at the lower part of the closed box body (4) and below the microwave decomposition transmission belt (5).
10. The sludge treatment system of claim 9, wherein: the wind power circulation system (6) comprises a closed side box (61), the upper part and the lower part of the closed side box (61) are communicated with the upper part and the lower part of the closed box body (4) respectively, a heat exchanger (7) is arranged at the upper part of the closed side box (61), a filter screen (63) and a condensate water discharge pipe (62) are arranged below the heat exchanger (7), a compressor (8) is arranged at the lower part of the closed side box (61), and the compressor (8) is connected with the lower part of the closed box body (4); the discharging mechanism (3) comprises at least two spiral discharging rods (31) which are arranged in parallel and adjacently, and a plurality of salient points (32) are arranged on threads of the spiral discharging rods (31) respectively so that a plurality of air holes are distributed on the flaky sludge material.
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| CN112154810A (en) * | 2020-09-11 | 2021-01-01 | 杭州中艺生态环境工程有限公司 | Ecological greening device combining vertical greening and light greening and culture medium |
| CN114538747A (en) * | 2021-12-31 | 2022-05-27 | 杭州埃莫森土壤科技有限公司 | Sludge treatment method and ecological soil prepared by sludge treatment method |
| CN114538720A (en) * | 2021-12-31 | 2022-05-27 | 杭州埃莫森土壤科技有限公司 | Sludge pre-treatment method, sludge pre-treatment material prepared by sludge pre-treatment method and application of sludge pre-treatment material |
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