CN105366906A - Biochemical treatment method for heavy metal in sludge - Google Patents
Biochemical treatment method for heavy metal in sludge Download PDFInfo
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- CN105366906A CN105366906A CN201510935972.4A CN201510935972A CN105366906A CN 105366906 A CN105366906 A CN 105366906A CN 201510935972 A CN201510935972 A CN 201510935972A CN 105366906 A CN105366906 A CN 105366906A
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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
- C02F11/02—Biological treatment
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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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
- C02F2303/00—Specific treatment goals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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Abstract
A biochemical treatment method for heavy metal in sludge comprises the following steps that the sludge to be treated is aerated into a first tank through a first vent hole, airflow flows into a first flow guide cover from a first lower opening of the first flow guide cover, and irregular vortexes and negative pressure are formed in the first flow guide cover; the sludge, sulfur oxide bacillus and culture liquid are sucked into the flow guide cover from the bottom of the flow guide cover and lifted into the first flow guide cover to be fully mixed, flow out of a first upper opening of the first flow guide cover under the action of the airflow and are settled to flow back into the first tank; the sludge, sulfur oxide bacillus and culture liquid flowing back into the first tank are sucked into the first flow guide cover from the bottom of the first flow guide cover again under the action of the airflow and lifted into the first flow guide cover, and therefore repeated circulation is achieved between the first tank and the first flow guide cover, and the heavy metal of the sludge and sulfur oxide bacillus achieve the full gas-solid contact effect; the heavy metal is oxidized and acidized by sulfur oxide bacillus to be dissolved out of the sludge, and the content of the heavy metal in the sludge is eliminated.
Description
Technical field
The present invention relates to a kind of sludge disposal technology, refer in particular to a kind of sludge heavy-metal biochemical processing method.
Background technology
In recent years, along with the quick growth of wastewater treatment in China ability and processing rate, the phenomenon that excess sludge produces in a large number is brought.Current national urban wastewater treatment firm mud only has small portion to carry out sanitary landfill, Land_use change, burning and building materials utilization etc., and major part is not carried out normalized process and disposed.The heavy metal contained in excess sludge due to non-degradable, if dispose without effective process and arbitrarily transport outward, simple landfill or stacking, very easily cause persistence to pollute to underground water, soil etc., direct threatening environment safety and public health.
Heavy metal in mud mainly comprises Pb, Cd, Hg, Cr, Ni, Cu, Zn etc., and its harm is not only relevant with content, also closely related with existing forms.Processing mode correspondingly also has two kinds, and a kind of is fixed by the heavy metal in mud or stablize, and another kind of mode is removed from mud by heavy metal.Concerning the former, heavy metal is still present in mud or derivatives thereof, but becoming low molten or insoluble, nontoxic, stable state from easy molten, poisonous, unsure state, namely making mud reach innoxious by reducing the content of heavy metal labile state, the activity reducing heavy metal and biological effectiveness; Latter carrys out lignin-sludge by the total amount of physics, chemistry, biological method minimizing Heavy Metals in Sludge.
Chinese invention patent application (application number: a kind of method 201510042587.7) disclosing Heavy Metals in Sludge process, protein in mud is hydrolyzed mainly through properties-correcting agent effect by it, amino acid deamination and ammonia fixing, the fixing rear ammonium chloride of generation and the calcium hydroxide of interpolation and glucose powder is utilized progressively to react, to reduce sludge heavy-metal ion combination valency or to be directly reduced to simple substance.Although above technique can play certain removal effect to Heavy Metals in Sludge, but also has some shortcomings in time use procedure: 1, removal efficiency is low, and the treatment time is long, is unfavorable for large-scale promotion application; 2, need to add new properties-correcting agent, new pollutent can be increased to mud; 3, properties-correcting agent cost is higher and need to regulate potential of hydrogen, easily occurs that inactivation, treatment capacity are little and processing efficiency is not good.
Summary of the invention
The invention provides a kind of sludge heavy-metal biochemical processing method, its main purpose is to overcome the little and defect that processing efficiency is not good of heavy metal treatment capacity that existing method for sludge treatment exists.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of sludge heavy-metal biochemical processing method, comprise the following steps: pending mud is dropped into one and is contained with in the first tank body of the nutrient solution of oxidation-containing sulfur bacillus, wherein this first tank base is provided with the first ventage, inside is inserted with the first drainage hood, by the first ventage to aeration in the first tank body, air-flow is flowed in the first drainage hood by the first lower opening of the first drainage hood, irregular eddy current and negative pressure is formed in the first drainage hood, mud, thiobacillus thiooxidant and nutrient solution are inhaled into from the bottom of drainage hood, rise to fully mixing in the first drainage hood, and under the effect of air-flow by the first drainage hood first upper shed flow out and sedimentation be back in the first tank body, be back to the mud in the first tank body, thiobacillus thiooxidant and nutrient solution are inhaled into by the bottom of airflow function from the first drainage hood again, rise in the first drainage hood, thus between the first tank body and the first drainage hood iterative cycles, the heavy metal of mud and thiobacillus thiooxidant is made to obtain sufficient gas-solid contact effect, make oxidation and acidification stripping from mud of the oxidated thiobacillus of heavy metal, eliminate the content of heavy metal in mud.
Further, after the first tank body internal cause ventilation causes air pressure to increase, interstitial water and thiobacillus thiooxidant can be increased to the infiltration of mud internal void, the contact frequency of oxidation reinforced thiobacillus and mud, improve the ability of heavy metal in its picked-up mud, after the first tank body internal pressure increases to 700kPa, after first pressure sensor module detects this pressure vertex threshold value, touch and stop ventilating in the first tank body, and start the first pressure release valve simultaneously, above-mentioned first pressure release valve controls the first tank body exhaust, the pressure of the first tank interior is reduced to normal atmosphere by 700kPa, the top of described first tank body produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take heavy metal and reacted resultant out of mud hole, because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore mud pore interior pressure is caused to increase, when mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, the exposed amount of heavy metal in mud is increased, greatly improve the gas-solid contact effect of heavy metal and thiobacillus thiooxidant, strengthen its biochemical reaction, drastically increase the removal effect of Heavy Metals in Sludge, when the pressure recovery in the first tank body is to general atmosphere pressure, after first pressure sensor module detects this pressure lower-most point threshold value, touch and again ventilate in the first tank body, and close the first pressure release valve simultaneously, again again be depressurized to normal atmosphere by after the first tank interior boost in pressure to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes the removal of heavy metal.
Compared to the prior art, the beneficial effect that the present invention produces is:
1, the present invention is practical, passed into by the bottom of air-flow by the first tank body, air-flow is flowed in the first drainage hood by the first lower opening of the first drainage hood, irregular eddy current and negative pressure is formed in the first drainage hood, mud, thiobacillus thiooxidant and nutrient solution are inhaled into from the bottom of drainage hood, rise to fully mixing in the first drainage hood, and under the effect of air-flow by the first drainage hood first upper shed flow out and sedimentation be back in the first tank body, be back to the mud in the first tank body, thiobacillus thiooxidant and nutrient solution are inhaled into by the bottom of airflow function from the first drainage hood again, rise in the first drainage hood, thus between the first tank body and the first drainage hood iterative cycles, the heavy metal of mud and thiobacillus thiooxidant is made to obtain sufficient gas-solid contact effect, make oxidation and acidification stripping from mud of the oxidated thiobacillus of heavy metal, eliminate the content of heavy metal in mud.
2, in the present invention, after the first tank body internal cause ventilation causes air pressure to increase, interstitial water and thiobacillus thiooxidant can be increased to the infiltration of mud internal void, the contact frequency of oxidation reinforced thiobacillus and mud, improve the ability of heavy metal in its picked-up mud, after the first tank body internal pressure increases to 700kPa, after first pressure sensor module detects this pressure vertex threshold value, touch Blast mechanism to stop ventilating in the first tank body, and start the first pressure release valve simultaneously, above-mentioned first pressure release valve controls the first tank body exhaust, the pressure of the first tank interior is reduced to normal atmosphere by 700kPa, the top of described first tank body produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take heavy metal and reacted resultant out of mud hole.Because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore causes mud pore interior pressure to increase.When mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, the exposed amount of heavy metal in mud is increased, greatly improve the gas-solid contact effect of heavy metal and thiobacillus thiooxidant, strengthen its biochemical reaction, drastically increase the removal effect of Heavy Metals in Sludge, when the pressure recovery in the first tank body is to general atmosphere pressure, after first pressure sensor module detects this pressure lower-most point threshold value, touch Blast mechanism again to ventilate in the first tank body, and close the first pressure release valve simultaneously, again again be depressurized to normal atmosphere by after the first tank interior boost in pressure to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes the removal of heavy metal.
Accompanying drawing explanation
Fig. 1 is the structural representation of sludge treatment device described in embodiment.
Fig. 2 is the enlarged diagram at A place in Fig. 1.
Embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is described.
See figures.1.and.2.A kind of sludge treatment device, comprises sludge heavy-metal biochemical treatment tank body 1, sludge dewatering conditioning tank body 2 and the dry tank body 3 of a sludge dewatering that mud 9 successively passes into successively.
See figures.1.and.2.Described sludge heavy-metal biochemical treatment tank body 1 comprises one first tank body 10, one the first drainage hood 11 and the Blast mechanism 4 being arranged at this first tank body 10 inside, described first tank body 10 is provided with one for throwing in the first opening for feed 101 of the mud raw material containing heavy metal, one for throwing in the first dog-house 102 and first ventage 103 be connected with Blast mechanism 4 of the nutritive medium of oxidation-containing sulfur bacillus, described first ventage 103 is positioned at the bottom of described first tank body 10, described first drainage hood 11 comprises one first upper shed, the first drainage channel that one the first lower opening and be positioned at directly over described first ventage 103 extends to the first upper shed by the first lower opening and formed.Described first opening for feed 101 and the first dog-house 102 are respectively arranged at the both sides of described first tank body 10 upper end, described first tank body 10 is a thermally conductive material tank body, described first tank body 10 is also provided with a heating part, this heating part is one around the snake pipe 108 being arranged at described first tank body 10 outer side wall, the thermostat that this snake pipe 108 and one is contained with heating fluid is connected, described heavy metal biochemical treatment tank body 1 also comprises the first pressure sensor module 17 and one first pressure release valve 18 be electrically connected with this first pressure sensor module 17 that is arranged at the first tank body 10 top, described first pressure release valve 18 is for controlling discharge and the cut out of the first tank body 10 internal liquid level upper air.
See figures.1.and.2.Described sludge dewatering conditioning tank body 2 comprises the second drainage hood 21 that one second tank body 20 and is arranged at this second tank body 20 inside, described second tank body 20 is provided with one for the second opening for feed 22 by mud raw material, one for throwing in the second dog-house 23 and second ventage 24 be also connected with Blast mechanism 4 of conditioning material, described second ventage 24 is positioned at the bottom of described second tank body 20, described second drainage hood 21 comprises one second upper shed, the second drainage channel that one the second lower opening and be positioned at directly over described second ventage 24 extends to the second upper shed by the second lower opening and formed, described second opening for feed 22 is communicated in described first ventage 103.Described sludge dewatering conditioning tank body 2 also comprises the second pressure sensor module 27 and one second pressure release valve 28 be electrically connected with this second pressure sensor module 27 that is arranged at the second tank body 20 top, and described second pressure release valve 28 is for controlling discharge and the cut out of the second tank body 20 internal liquid level upper air.Described second drainage hood 21 is provided with a plurality of spaced apart conduction hole 210, above described conduction hole 210, is provided with the drainage cap 211 protruded outwardly.In described second dog-house 23, throw in conditioning material comprise the three kinds of conditioning material successively added successively, the conditioning material that first time adds is that fuel-burning power plant ash flies, the conditioning material that second time adds is ferric chloride Solution or cationic polyelectrolytes, and the conditioning material added for the last time is polymethacrylate system both sexes co-polymer.
See figures.1.and.2.The dry tank body 3 of described sludge dewatering comprises the upper tank body 30 of lower ending opening and the lower tank 31 of upper end open, the lower end of upper tank body 30 and the upper end of lower tank 31 removably link together, upper tank body 30 is connected with the pressurizing device 32 with the inner space of upper tank body 30, upper tank body 30 is also provided with the mud inlet 33 in order to sludge solutions to be sent into upper tank body 30, the filtering layer 34 in order to carry out grain slag separation to sludge solutions is provided with in lower tank 31, lower tank 31 there is the first pressure modulating opening 310, first pressure modulating opening 310 is arranged on the below of filtering layer 34, also comprise vacuum tank 35, vacuum tank 35 is provided with the second pressure modulating opening 350, first pressure modulating opening 310 is communicated with by pipe connecting with the second pressure modulating opening 350, vacuum tank 35 is connected with vacuum extractor 36, lower tank 31 is provided with the first row mouth of a river 312, the first row mouth of a river 312 is connected to sewage plash 37 by first row water pipe, the first row mouth of a river 312 is arranged on the below of the first pressure modulating opening 310, vacuum tank 35 is provided with the second row mouth of a river 352, the second row mouth of a river 352 is arranged on the below of the second pressure modulating opening 350, second row cross current is passed through to sewage plash 37 in the second row mouth of a river 352, described lower tank 31 is also provided with a microwave heating installation 38 and the 3rd pressure modulating opening 311 above filtering layer 34, the metallic shield ring 381 that described microwave heating installation 38 comprises a plurality of microwave launcher 380 and is coated on outside this microwave launcher 380, described lower tank 31 inner-wall surface is installed on outside this metallic shield ring 381, described lower tank 31 is provided with the metallic shield net 382 of coated whole 3rd pressure modulating opening 311 in the 3rd pressure modulating opening 311 position, described vacuum tank 35 is provided with the 4th pressure modulating opening 351, described 3rd pressure modulating opening 311 is communicated with by pipe connecting with the 4th pressure modulating opening 351.The lower end of described upper tank body 30 is connected with upper flange, and the upper end of described lower tank 31 is connected with lower flange, and upper flange and lower flange are removably linked together by web member, between upper flange and lower flange, be provided with silicone gasket.The inwall of described lower tank 31 is provided with ring-type brace table, the filter screen 341 that described filtering layer 34 comprises sieve tray 340 and is arranged on sieve tray 340, and sieve tray 340 is erected on ring-type brace table.Also be provided with one in described upper tank body 30 in order to monitor the pressure monitoring device 305 of upper tank body 30 chamber pressure, described pressure monitoring device 305 comprises showing the first tensimeter of malleation and the second tensimeter in order to show negative pressure.The mesh of described metallic shield net 382 is less than the microwave wavelength presetting the generation of described microwave launcher 380.
See figures.1.and.2.Described Blast mechanism 4 is provided with a T-valve, and the other two-way of this T-valve is connected on described first ventage 103 and the second ventage 24.
See figures.1.and.2.Working process of the present invention is a kind of method for sludge treatment.
A treatment process for mud, comprises the following steps: a, heavy metal biochemical treatment; B, sludge dewatering conditioning; C, sludge dewatering drying.
Wherein, described heavy metal biochemical treatment comprises, pending mud is dropped into one to be contained with in the first tank body 10 of the nutrient solution of oxidation-containing sulfur bacillus, wherein be provided with the first ventage 103 bottom this first tank body 10, inside is inserted with the first drainage hood 11, by the first ventage 103 to aeration in the first tank body 10, air-flow is flowed in the first drainage hood 11 by the first lower opening of the first drainage hood 11, irregular eddy current and negative pressure is formed in the first drainage hood 11, mud, thiobacillus thiooxidant and nutrient solution are inhaled into from the bottom of drainage hood, rise to fully mixing in the first drainage hood 11, and under the effect of air-flow by the first drainage hood 11 first upper shed flow out and sedimentation be back in the first tank body 10, be back to the mud in the first tank body 10, thiobacillus thiooxidant and nutrient solution are inhaled into by the bottom of airflow function from the first drainage hood 11 again, rise in the first drainage hood 11, thus between the first tank body 10 and the first drainage hood 11 iterative cycles, the heavy metal of mud and thiobacillus thiooxidant is made to obtain sufficient gas-solid contact effect, make oxidation and acidification stripping from mud of the oxidated thiobacillus of heavy metal, eliminate the content of heavy metal in mud.In this step, by arranging the first pressure sensor module 17 and the first pressure release valve 18, and coordinate the ventilation effect of Blast mechanism 4, a pressure cycling treatment system can be formed, after the first tank body 10 internal cause ventilation causes air pressure to increase, interstitial water and thiobacillus thiooxidant can be increased to the infiltration of mud internal void, the contact frequency of oxidation reinforced thiobacillus and mud, improve the ability of heavy metal in its picked-up mud, after the first tank body 10 internal pressure increases to 700kPa, after first pressure sensor module 17 detects this pressure vertex threshold value, touch Blast mechanism 4 to stop ventilating in the first tank body 10, and start the first pressure release valve 18 simultaneously, above-mentioned first pressure release valve 18 controls the first tank body 10 and is vented, the pressure of the first tank body 10 inside is reduced to normal atmosphere by 700kPa, the top of described first tank body 10 produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take heavy metal and reacted resultant out of mud hole.Because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore causes mud pore interior pressure to increase.When mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, the exposed amount of heavy metal in mud is increased, greatly improve the gas-solid contact effect of heavy metal and thiobacillus thiooxidant, strengthen its biochemical reaction, drastically increase the removal effect of Heavy Metals in Sludge, when the pressure recovery in the first tank body 10 is to general atmosphere pressure, after first pressure sensor module 17 detects this pressure lower-most point threshold value, touch Blast mechanism 4 again to ventilate in the first tank body 10, and close the first pressure release valve 18 simultaneously, again normal atmosphere is depressurized to after again the first tank body 10 internal pressure being risen to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes the removal of heavy metal.
Wherein, described sludge dewatering conditioning comprises, successively add the process of three kinds of conditioning material successively, the conditioning material that first time adds is that fuel-burning power plant ash flies, the conditioning material that second time adds is ferric chloride Solution or cationic polyelectrolytes, and the conditioning material added for the last time is polymethacrylate system both sexes co-polymer.In this step, when mud raw material and three kinds of conditioning material drop in the second tank body 20 completely, described Blast mechanism 4 is by pressurization, improve the pressure of this second tank body 20 inside, after the second tank body 20 internal cause ventilation causes air pressure to increase, interstitial water and the infiltration of three kinds of conditioning material to mud internal void can be increased, strengthen the contact frequency of three kinds of conditioning material and mud, improve the effect of its opsonic reaction, after the second tank body 20 internal pressure increases to 700kPa, after second pressure sensor module 27 detects this pressure vertex threshold value, touch Blast mechanism 4 to stop ventilating in the second tank body 20, and start the second pressure release valve 28 simultaneously, above-mentioned second pressure release valve 28 controls the second tank body 20 and is vented, the pressure of the second tank body 20 inside is reduced to normal atmosphere by 700kPa, the top of described second tank body 20 produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take the resultant after opsonic reaction out of mud hole.Because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore causes mud pore interior pressure to increase.When mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, polyelectrolyte and organic exposed amount in mud are increased, greatly improve it and three kinds nurse one's health the gas-solid contact effect of expecting, strengthen its physical and chemical reaction, thus yield stress and the outward appearance viscosity of mud can be reduced, contribute to improving sludge dewatering effect, when the pressure recovery in the first tank body 10 is to general atmosphere pressure, after first pressure sensor module 17 detects this pressure lower-most point threshold value, touch Blast mechanism 4 again to ventilate in the first tank body 10, and close the first pressure release valve 18 simultaneously, again normal atmosphere is depressurized to after again the first tank body 10 internal pressure being risen to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes overall dehydrating and conditioning.
More specifically, in described sludge dewatering conditioning process, mud raw material and three kinds of conditioning material enter in the second tank body 20 by the second opening for feed 22 and the second dog-house 23 respectively, and the forced air produced by Blast mechanism 4 produces bubble by the bottom of the second tank body 20, and inject in the second drainage channel by the second lower opening of the second drainage hood 21, and under the effect of air-flow by the second drainage hood 21 second upper shed flow out and sedimentation be back in the second tank body 20, be back to mud raw material in the second cell body and three kinds of conditioning material are inhaled into by second lower opening of airflow function from the second drainage hood 21 again, rise in the second drainage hood 21, thus between the second tank body 20 and the second drainage hood 21 iterative cycles, mud raw material and three kinds of conditioning material are made to obtain sufficient gas-solid contact effect, thus yield stress and the outward appearance viscosity of mud can be reduced, contribute to improving sludge dewatering effect.
Wherein, described sludge dewatering drying comprises, in use, water-containing sludge mixing liquid is drawn in upper tank body 30, afterwards mud inlet 33 is closed, start pressurizing device 32 and vacuum extractor 36, by pressurizing device 32, the pressure in upper tank body 30 is strengthened, the Pressure Drop in lower tank 31 is made to be low to moderate vacuum state by vacuum tank 35, larger pressure difference is formed between upper tank body 30 like this and lower tank 31, the water being arranged in the water-containing sludge mixing liquid of upper tank body 30 can rapidly by filtering layer 34, mud then stays the top of filtering layer 34, and due between upper tank body 30 and lower tank 31 can mineralization pressure poor, ensure to carry out solid-liquid separation fast, after solid-liquid separation is complete, start microwave launcher 380 and discharge microwave, water molecules effect in microwave and mud and being heated, moisture contained by mud can be spread and evaporate in air, reach effect of sludge-drying.After the moisture removal in body refuse is complete, realize being communicated with by the pore in body refuse between upper tank body 30 with lower tank 31, the pressure of upper tank body 30 reduces rapidly, can judge that mud is processed complete by pressure monitoring device 305, by lower tank 31 is dismantled, and body refuse is cleaned out, body refuse can be used in the building field such as filler or compound manure and recycle.In this step, from filtering layer 34, permeate the moisture got off drain into sewage plash 37 mainly through the first row mouth of a river 312, and the water vapour in lower tank 31 can enter vacuum tank 35 by pipe connecting and drain into wastewater influent pond from the second row mouth of a river 352, thus ensure that moisture can fully be discharged.
Meanwhile, adopt metallic shield technology to make microwave can repeated reflection microwave heating installation 38 in, avoid the microwave produced in drying process to leak, and then mud can be made to be heated properly oven dry, the drying effect of raising mud.Carrying out in microwave heating process, vacuum tank 35 can act on simultaneously, lower tank 31 inside is caused to form a negative pressure, thus produce an air-flow, take away the water vapor that heat-processed produces, then after the mesh of metallic shield net 382, enter vacuum tank 35 and drain into wastewater influent pond from the second row mouth of a river 352.
Compared to the prior art, the beneficial effect that the present invention produces is:
1, structure of the present invention is simple, practical, by arranging a heavy metal biochemical treatment tank body, can be passed into by the bottom of air-flow by the first tank body 10, air-flow is flowed in the first drainage hood 11 by the first lower opening of the first drainage hood 11, irregular eddy current and negative pressure is formed in the first drainage hood 11, mud, thiobacillus thiooxidant and nutrient solution are inhaled into from the bottom of drainage hood, rise to fully mixing in the first drainage hood 11, and under the effect of air-flow by the first drainage hood 11 first upper shed flow out and sedimentation be back in the first tank body 10, be back to the mud in the first tank body 10, thiobacillus thiooxidant and nutrient solution are inhaled into by the bottom of airflow function from the first drainage hood 11 again, rise in the first drainage hood 11, thus between the first tank body 10 and the first drainage hood 11 iterative cycles, the heavy metal of mud and thiobacillus thiooxidant is made to obtain sufficient gas-solid contact effect, make oxidation and acidification stripping from mud of the oxidated thiobacillus of heavy metal, eliminate the content of heavy metal in mud.
2, in the present invention, by arranging a sludge dewatering conditioning tank body 2, after conditioning material adds, the forced air produced by Blast mechanism 4 produces bubble by the bottom of the second tank body 20, and inject in the second drainage channel by the second lower opening of the second drainage hood 21, and under the effect of air-flow by the second drainage hood 21 second upper shed flow out and sedimentation be back in the second tank body 20, be back to mud raw material in the second cell body and three kinds of conditioning material are inhaled into by second lower opening of airflow function from the second drainage hood 21 again, rise in the second drainage hood 21, thus between the second tank body 20 and the second drainage hood 21 iterative cycles, mud raw material and three kinds of conditioning material are made to obtain sufficient gas-solid contact effect, thus yield stress and the outward appearance viscosity of mud can be reduced, contribute to improving sludge dewatering effect.
3, in the present invention, the conditioning material added not only comprises fuel-burning power plant ash and flies this physics conditioning material, also comprises ferric chloride Solution and these two kinds of chemical conditioning material of polymethacrylate system both sexes co-polymer.Add fuel-burning power plant ash and fly drainage, when coordinating high molecular polymer to carry out multiple conditioning, the chemical feeding quantity of high molecular polymer can be reduced, and promote the dewatering efficiency of mud, increase the solid content of sludge cake.Additionally by arranging two kinds of chemical conditioning material, and utilize the interaction between these two kinds of chemical conditioning material, cause misfit form, reach better flocculating effect, increase the adhesion between mud granule, formed more greatly and stronger glue plumage, reduces polyelectrolyte and residue in solution, improve the dehydration property of mud simultaneously.
4, in the present invention, by arranging the dry tank body 3 of a sludge dewatering, in use sewage solution is transported in upper tank body 30 from mud inlet 33, afterwards mud inlet 33 is closed, start pressurizing device 32 and vacuum extractor 36, strengthened by the pressure in upper tank body during pressurizing device 32 30, the Pressure Drop in lower tank 31 is made to be low to moderate vacuum state by vacuum tank 35, larger pressure difference is formed between upper tank body 30 like this and lower tank 31, the moisture being arranged in the sewage solution of upper tank body 30 can rapidly by filtering layer 34, body refuse then stays the top of filtering layer 34, when going back residual moisture in body refuse, due to the water seal effect of moisture, between upper tank body 30 and lower tank 31 can mineralization pressure poor, ensure to carry out grain slag separation fast, after the moisture removal in body refuse is complete, realize being communicated with by the pore in body refuse between upper tank body 30 with lower tank 31, the pressure of upper tank body 30 reduces rapidly, can judge that mud is processed complete by pressure monitoring device 305, by lower tank 31 is dismantled, and body refuse is cleaned out, body refuse can be used in the building field such as filler or compound manure and recycle.In the present invention, from filtering layer 34, permeate the moisture got off drain into sewage plash 37 mainly through the first row mouth of a river 312, and the water vapour in lower tank 31 can enter vacuum tank 35 by pipe connecting and drain into wastewater influent pond from the second row mouth of a river 352, thus ensure that moisture can fully be discharged.
5, in the present invention, by arranging microwave heating installation 38 in lower tank 31, and microwave heating installation 38 can discharge place's microwave, the water molecules in mud and this microwave is made to carry out interacting and being heated, thus make the moisture contained by mud can spread and volatilize, reach the object of sludge-drying.
6, in the present invention, by the cooperation of bleeding between the 4th pressure modulating opening 351 on vacuum tank 35 and the 3rd pressure modulating opening 311 near microwave heating installation 38, microwave heating installation 38 inside is caused to form a negative pressure, and then produce an air-flow, the top air inlet of this air-flow lower tank 31, and through vacuum tank 35, take away the water vapor that microwave heating process produces, water vapour can be delivered in vacuum tank 35 by pipe connecting, and be condensed into liquid water at vacuum tank 35, and be delivered in sewage plash 37 by second row water pipe, so can ensure that the moisture in lower tank 31 is disposed in sewage plash 37 comparatively fully.
7, in the present invention, by arranging metallic shield ring 381 and metallic shield net 382, can make microwave can repeated reflection in microwave heating installation 38, avoiding the microwave produced in drying process to leak.Also mud can be made to be heated properly oven dry simultaneously, improve the drying effect of mud further.
8, in the present invention, by arranging the first pressure sensor module 17 and the first pressure release valve 18, and coordinate the ventilation effect of Blast mechanism 4, a pressure cycling treatment system can be formed, after the first tank body 10 internal cause ventilation causes air pressure to increase, interstitial water and thiobacillus thiooxidant can be increased to the infiltration of mud internal void, the contact frequency of oxidation reinforced thiobacillus and mud, improve the ability of heavy metal in its picked-up mud, after the first tank body 10 internal pressure increases to 700kPa, after first pressure sensor module 17 detects this pressure vertex threshold value, touch Blast mechanism 4 to stop ventilating in the first tank body 10, and start the first pressure release valve 18 simultaneously, above-mentioned first pressure release valve 18 controls the first tank body 10 and is vented, the pressure of the first tank body 10 inside is reduced to normal atmosphere by 700kPa, the top of described first tank body 10 produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take heavy metal and reacted resultant out of mud hole.Because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore causes mud pore interior pressure to increase.When mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, the exposed amount of heavy metal in mud is increased, greatly improve the gas-solid contact effect of heavy metal and thiobacillus thiooxidant, strengthen its biochemical reaction, drastically increase the removal effect of Heavy Metals in Sludge, when the pressure recovery in the first tank body 10 is to general atmosphere pressure, after first pressure sensor module 17 detects this pressure lower-most point threshold value, touch Blast mechanism 4 again to ventilate in the first tank body 10, and close the first pressure release valve 18 simultaneously, again normal atmosphere is depressurized to after again the first tank body 10 internal pressure being risen to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes the removal of heavy metal.
9, in the present invention, by arranging the second pressure sensor module 27 and the second pressure release valve 28, and coordinate the ventilation effect of Blast mechanism 4, another pressure cycling treatment system can be formed, after the second tank body 20 internal cause ventilation causes air pressure to increase, interstitial water and the infiltration of three kinds of conditioning material to mud internal void can be increased, strengthen the contact frequency of three kinds of conditioning material and mud, improve the effect of its opsonic reaction, after the second tank body 20 internal pressure increases to 700kPa, after second pressure sensor module 27 detects this pressure vertex threshold value, touch Blast mechanism 4 to stop ventilating in the second tank body 20, and start the second pressure release valve 28 simultaneously, above-mentioned second pressure release valve 28 controls the second tank body 20 and is vented, the pressure of the second tank body 20 inside is reduced to normal atmosphere by 700kPa, the top of described second tank body 20 produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take the resultant after opsonic reaction out of mud hole.Because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore causes mud pore interior pressure to increase.When mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, polyelectrolyte and organic exposed amount in mud are increased, greatly improve it and three kinds nurse one's health the gas-solid contact effect of expecting, strengthen its physical and chemical reaction, thus yield stress and the outward appearance viscosity of mud can be reduced, contribute to improving sludge dewatering effect, when the pressure recovery in the first tank body 10 is to general atmosphere pressure, after first pressure sensor module 17 detects this pressure lower-most point threshold value, touch Blast mechanism 4 again to ventilate in the first tank body 10, and close the first pressure release valve 18 simultaneously, again normal atmosphere is depressurized to after again the first tank body 10 internal pressure being risen to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes overall dehydrating and conditioning.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (2)
1. a sludge heavy-metal biochemical processing method, it is characterized in that, comprise the following steps: pending mud is dropped into one and is contained with in the first tank body of the nutrient solution of oxidation-containing sulfur bacillus, wherein this first tank base is provided with the first ventage, inside is inserted with the first drainage hood, by the first ventage to aeration in the first tank body, air-flow is flowed in the first drainage hood by the first lower opening of the first drainage hood, irregular eddy current and negative pressure is formed in the first drainage hood, mud, thiobacillus thiooxidant and nutrient solution are inhaled into from the bottom of drainage hood, rise to fully mixing in the first drainage hood, and under the effect of air-flow by the first drainage hood first upper shed flow out and sedimentation be back in the first tank body, be back to the mud in the first tank body, thiobacillus thiooxidant and nutrient solution are inhaled into by the bottom of airflow function from the first drainage hood again, rise in the first drainage hood, thus between the first tank body and the first drainage hood iterative cycles, the heavy metal of mud and thiobacillus thiooxidant is made to obtain sufficient gas-solid contact effect, make oxidation and acidification stripping from mud of the oxidated thiobacillus of heavy metal, eliminate the content of heavy metal in mud.
2. a kind of sludge heavy-metal biochemical processing method as claimed in claim 1, it is characterized in that: after the first tank body internal cause ventilation causes air pressure to increase, interstitial water and thiobacillus thiooxidant can be increased to the infiltration of mud internal void, the contact frequency of oxidation reinforced thiobacillus and mud, improve the ability of heavy metal in its picked-up mud, after the first tank body internal pressure increases to 700kPa, after first pressure sensor module detects this pressure vertex threshold value, touch and stop ventilating in the first tank body, and start the first pressure release valve simultaneously, above-mentioned first pressure release valve controls the first tank body exhaust, the pressure of the first tank interior is reduced to normal atmosphere by 700kPa, the top of described first tank body produces a large amount of microbubbles because of exhaust, gas in interstitial water can disengage and take heavy metal and reacted resultant out of mud hole, because the hole of mud is too small, the speed that during decompression, gas disengages often is greater than the speed that gas is discharged from hole, therefore mud pore interior pressure is caused to increase, when mud pore interior pressure is greater than the pressure that mud granule wall can bear, just mud granule can be caused to implode or burst, the exposed amount of heavy metal in mud is increased, greatly improve the gas-solid contact effect of heavy metal and thiobacillus thiooxidant, strengthen its biochemical reaction, drastically increase the removal effect of Heavy Metals in Sludge, when the pressure recovery in the first tank body is to general atmosphere pressure, after first pressure sensor module detects this pressure lower-most point threshold value, touch and again ventilate in the first tank body, and close the first pressure release valve simultaneously, again again be depressurized to normal atmosphere by after the first tank interior boost in pressure to 700kPa, constantly complete the circulation of supercharging and decompression, until mud completes the removal of heavy metal.
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| CN107032572A (en) * | 2016-12-14 | 2017-08-11 | 晋江市世龙厨房设备有限公司 | A kind of method for sludge treatment for improving removal efficiency of heavy metals |
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| CN103274575A (en) * | 2013-03-26 | 2013-09-04 | 福建省亚热带植物研究所 | Method for efficiently purifying municipal sludge heavy metals |
| CN105016446A (en) * | 2015-08-10 | 2015-11-04 | 北京格兰特膜分离设备有限公司 | Gas stripping circulation three-phase reaction device and sewage treatment method |
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| JPH1157793A (en) * | 1997-08-22 | 1999-03-02 | Toray Ind Inc | Waste water treatment and device therefor |
| CN201574111U (en) * | 2009-11-11 | 2010-09-08 | 深圳市蓝凤凰环保科技有限公司 | Automatic solid-liquid separation system for sludge autothermal thermophilic aerobic digestion |
| CN103274575A (en) * | 2013-03-26 | 2013-09-04 | 福建省亚热带植物研究所 | Method for efficiently purifying municipal sludge heavy metals |
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| CN107032572A (en) * | 2016-12-14 | 2017-08-11 | 晋江市世龙厨房设备有限公司 | A kind of method for sludge treatment for improving removal efficiency of heavy metals |
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