CN105366901A - Sludge treatment method improving dehydration efficiency - Google Patents
Sludge treatment method improving dehydration efficiency Download PDFInfo
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- CN105366901A CN105366901A CN201510935789.4A CN201510935789A CN105366901A CN 105366901 A CN105366901 A CN 105366901A CN 201510935789 A CN201510935789 A CN 201510935789A CN 105366901 A CN105366901 A CN 105366901A
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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
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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
- C02F11/12—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
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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
- C02F2303/06—Sludge reduction, e.g. by lysis
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- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
A sludge treatment method improving dehydration efficiency includes the following steps of 1, biochemical treatment of heavy metal, 2, dehydration conditioning of sludge, and 3, dehydration drying of the sludge. In the step of dehydration drying of the sludge, the pressure in an upper tank body is increased through a pressurization device, the pressure in a lower tank body is decreased through a vacuum tank till the interior of the lower tank body is in a vacuum state, and thus a large pressure difference is formed between the upper tank body and the lower tank body; water in water-containing sludge mixed liquid in the upper tank body can pass through a filter layer quickly, the sludge remains on the filter layer, and quick solid-liquid separation is guaranteed due to the fact that the pressure difference can be formed between the upper tank body and the lower tank body; after solid-liquid separation is finished, a microwave emitting device is started to release microwaves, and the microwaves interact with water molecules in the sludge to heat the water molecules, so that the water molecules in the sludge disperse and volatilize into the air, and the effect of drying the sludge is achieved.
Description
Technical field
The present invention relates to a kind of method for sludge treatment, refer in particular to a kind of method for sludge treatment improving dewatering efficiency.
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.
In the process of sewage disposal; containing a large amount of larger particles and the suspended substance being difficult to precipitation in some sewage, some particle and suspended substance are difficult to again by biochemical degradation, now usually can carry out processed to sewage; formation filter residue after processed, filter residue can utilize as filler recovery.
As at Authorization Notice No. CN204434447U, name is called disclosed in the Chinese invention patent of " a kind of follow-on sludge vacuum dewatering unit ", describe a kind of follow-on sludge vacuum dewatering unit in that patent, comprise enclosed sewage surge tank, described sewage surge tank is connected with a dehydrating tube, one valve tube and some are for being inserted into the pipe connecting in sludge water, the other end of this valve tube is connected for the vacuum pump vacuumized with one, the other end of this pipe connecting is removably socketed with a sewage permeation joint, this sewage permeation joint is for stopping that mud enters this pipe connecting in company with current, this valve tube and pipe connecting are interconnected by described sewage surge tank, one end of described dehydrating tube is arranged on the bottom of sewage surge tank and is connected with a water pump, and the other end is arranged on the outside on sewage surge tank top, and this dehydrating tube is also provided with a water-level control apparatus, the top of described sewage surge tank is also provided with a limit switch, and this limit switch is for controlling unlatching or the cut out of described vacuum pump.
In that patent, by negative-pressure vacuum, the moisture in mud is separated with mud by sewage permeation joint, and pump in sewage surge tank, complete the processed of mud, but this device also exists that sewage dehydration rate is low, dewatering efficiency is lower and the feature of filter residue not easily processing and utilizing.
Summary of the invention
The invention provides a kind of method for sludge treatment improving dewatering efficiency, its main purpose is to overcome that the sewage dehydration rate that existing method for sludge treatment exists is low, dewatering efficiency is lower and the defect of filter residue not easily processing and utilizing.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Improve a method for sludge treatment for dewatering efficiency, comprise the following steps: a, heavy metal biochemical treatment, b, sludge dewatering conditioning, c, sludge dewatering drying, described sludge dewatering drying comprises, in use, water-containing sludge mixing liquid is drawn in upper tank body, afterwards mud inlet is closed, start pressurizing device and vacuum extractor, by pressurizing device, the pressure in upper tank body is strengthened, the Pressure Drop in lower tank is made to be low to moderate vacuum state by vacuum tank, larger pressure difference is formed between upper tank body like this and lower tank, the water being arranged in the water-containing sludge mixing liquid of upper tank body can pass through filtering layer rapidly, mud then stays the top of filtering layer, and due between upper tank body and lower tank can mineralization pressure poor, ensure to carry out solid-liquid separation fast, after solid-liquid separation is complete, start microwave launcher release 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.
Further, in described step c, described sludge dewatering drying also comprises, from filtering layer, permeate the moisture got off drain into sewage plash mainly through the first row mouth of a river, and the water vapour in lower tank can enter vacuum tank by pipe connecting and drain into wastewater influent pond from the second row mouth of a river, thus ensure that moisture can fully be discharged.
Further, in described step c, described sludge dewatering drying also comprises, metallic shield technology is adopted to make microwave can repeated reflection in microwave heating installation, avoid the microwave produced in drying process to leak, and then mud can be made to be heated properly oven dry, improve the drying effect of mud.
Further, in described step c, described sludge dewatering drying also comprises, carrying out in microwave heating process, vacuum tank can act on simultaneously, causes lower tank inside to form a negative pressure, thus produces an air-flow, take away the water vapor that heat-processed produces, then after the mesh of metallic shield net, enter vacuum tank and drain into wastewater influent pond from the second row mouth of a river.
Further, in described step b, 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, the conditioning material added for the last time is polymethacrylate system both sexes co-polymer, described sludge dewatering conditioning also comprises, during use, when mud raw material and three kinds of conditioning material drop in the second tank body completely, by pressurization, improve the pressure of this second tank interior, after the second tank body 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 internal pressure increases to 700kPa, after second pressure sensor module detects this pressure vertex threshold value, touch and stop ventilating in the second tank body, and start the second pressure release valve simultaneously, above-mentioned second pressure release valve controls the second tank body exhaust, the pressure of the second tank interior is reduced to normal atmosphere by 700kPa, the top of described second tank body 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 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, 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 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 overall dehydrating and conditioning.
Further, in described step b, described sludge dewatering conditioning also comprises, mud raw material and three kinds of conditioning material enter in the second tank body by the second opening for feed and the second dog-house respectively, and the forced air produced by Blast mechanism produces bubble by the bottom of the second tank body, and inject in the second drainage channel by the second lower opening of the second drainage hood, and under the effect of air-flow by the second drainage hood second upper shed flow out and sedimentation be back in the second tank body, 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 again, rise in the second drainage hood, thus between the second tank body and the second drainage hood 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.
Further, in described step a, described heavy metal biochemical treatment comprises, pending mud is dropped into one to be 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, in described step a, described heavy metal biochemical treatment bag also comprises, 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, present invention process is simple, practical, by sewage solution is transported in upper tank body from mud inlet, afterwards mud inlet is closed, start pressurizing device and vacuum extractor, strengthened by the pressure in upper tank body during pressurizing device, the Pressure Drop in lower tank is made to be low to moderate vacuum state by vacuum tank, larger pressure difference is formed between upper tank body like this and lower tank, the moisture being arranged in the sewage solution of upper tank body can pass through filtering layer rapidly, body refuse then stays the top of filtering layer, when going back residual moisture in body refuse, due to the water seal effect of moisture, between upper tank body and lower tank 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 with lower tank, the pressure of upper tank body reduces rapidly, can judge that mud is processed complete by pressure monitoring device, by lower tank 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, permeate the moisture got off drain into sewage plash mainly through the first row mouth of a river, and the water vapour in lower tank can enter vacuum tank by pipe connecting and drain into wastewater influent pond from the second row mouth of a river, thus ensure that moisture can fully be discharged.
2, in the present invention, place's microwave can be discharged by microwave heating installation, make the water molecules in mud and this microwave carry out interacting and being heated, thus make the moisture contained by mud can spread and volatilize, reach the object of sludge-drying.
3, in the present invention, by arranging metallic shield ring and metallic shield net, can make microwave can repeated reflection in microwave heating installation, 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.
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 (8)
1. improve a method for sludge treatment for dewatering efficiency, it is characterized in that, comprise the following steps: a, heavy metal biochemical treatment, b, sludge dewatering conditioning, c, sludge dewatering drying, described sludge dewatering drying comprises, in use, water-containing sludge mixing liquid is drawn in upper tank body, afterwards mud inlet is closed, start pressurizing device and vacuum extractor, by pressurizing device, the pressure in upper tank body is strengthened, the Pressure Drop in lower tank is made to be low to moderate vacuum state by vacuum tank, larger pressure difference is formed between upper tank body like this and lower tank, the water being arranged in the water-containing sludge mixing liquid of upper tank body can pass through filtering layer rapidly, mud then stays the top of filtering layer, and due between upper tank body and lower tank can mineralization pressure poor, ensure to carry out solid-liquid separation fast, after solid-liquid separation is complete, start microwave launcher release 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.
2. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 1, it is characterized in that: in described step c, described sludge dewatering drying also comprises, from filtering layer, permeate the moisture got off drain into sewage plash mainly through the first row mouth of a river, and the water vapour in lower tank can enter vacuum tank by pipe connecting and drain into wastewater influent pond from the second row mouth of a river, thus ensure that moisture can fully be discharged.
3. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 1, it is characterized in that: in described step c, described sludge dewatering drying also comprises, metallic shield technology is adopted to make microwave can repeated reflection in microwave heating installation, the microwave produced in drying process is avoided to leak, and then mud can be made to be heated properly oven dry, improve the drying effect of mud.
4. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 1, it is characterized in that: in described step c, described sludge dewatering drying also comprises, carrying out in microwave heating process, vacuum tank can act on simultaneously, causes lower tank inside to form a negative pressure, thus produces an air-flow, take away the water vapor that heat-processed produces, then after the mesh of metallic shield net, enter vacuum tank and drain into wastewater influent pond from the second row mouth of a river.
5. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 1, it is characterized in that: in described step b, 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, the conditioning material added for the last time is polymethacrylate system both sexes co-polymer, described sludge dewatering conditioning also comprises, during use, when mud raw material and three kinds of conditioning material drop in the second tank body completely, by pressurization, improve the pressure of this second tank interior, after the second tank body 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 internal pressure increases to 700kPa, after second pressure sensor module detects this pressure vertex threshold value, touch and stop ventilating in the second tank body, and start the second pressure release valve simultaneously, above-mentioned second pressure release valve controls the second tank body exhaust, the pressure of the second tank interior is reduced to normal atmosphere by 700kPa, the top of described second tank body 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 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, 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 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 overall dehydrating and conditioning.
6. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 5, it is characterized in that: in described step b, described sludge dewatering conditioning also comprises, mud raw material and three kinds of conditioning material enter in the second tank body by the second opening for feed and the second dog-house respectively, and the forced air produced by Blast mechanism produces bubble by the bottom of the second tank body, and inject in the second drainage channel by the second lower opening of the second drainage hood, and under the effect of air-flow by the second drainage hood second upper shed flow out and sedimentation be back in the second tank body, 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 again, rise in the second drainage hood, thus between the second tank body and the second drainage hood 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.
7. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 1, it is characterized in that: in described step a, described heavy metal biochemical treatment comprises, pending mud is dropped into one to be 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.
8. a kind of method for sludge treatment improving dewatering efficiency as claimed in claim 8, it is characterized in that: in described step a, described heavy metal biochemical treatment bag also comprises, 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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| CN116282801A (en) * | 2023-02-28 | 2023-06-23 | 湖北国新天汇能源有限公司 | High-temperature thermal hydrolysis treatment system and method for sludge treatment |
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