53results about How to "High degree of dehydration" patented technology

The present invention discloses a sludge dewatering conditioning agent, which comprises, by weight, 30-70% of desulfurization ash, 5-15% of a magnesium salt, 5-30% of an iron salt, 2-20% of an aluminum salt, and 0.1-15% of magnesium oxide. The invention further provides a dewatering method of the conditioning agent, wherein the dewatering method comprises conditioning agent solution preparing, sludge conditioning, flocculant solution preparing, sludge dewatering and other steps. According to the present invention, the characteristics of wide used raw material source, and low raw material price, low preparation cost and good dewatering effect are provided, the method can be performed through the existing sludge dewatering facility, the implementation process is simple, the stability and the reliability of the sludge dewatering process can be effectively improved, and the sludge dewatering conditioning agent and the dewatering method can be widely used for treatments of various wastewater, sewage and sludge.

The invention discloses a conditioner for sludge dehydration. Based on the dry weight of the sludge to be treated, the formula of the conditioner contains 10 to 20 percent of iron salt, 10 to 20 percent of burnt lime, 10 to 20 percent of coal gangue and 0.01 to 0.05 percent of potassium permanganate bactericide. The invention also discloses a conditioning method for the conditioner for the sludge dehydration, which comprises the following steps of: adding the potassium permanganate bactericide into the sludge to be treated at normal temperature under normal pressure, treating the sludge for at least 2 minutes with stirring, and then adding the iron salt to react for at least 2 minutes; and then adding the burnt lime to adjust the pH value to be neutral, reacting the mixture for at least 2 minutes, adding the coal gangue to react for at least 2 minutes, and finally performing pressure filtration. The invention has the advantages of low cost, wide raw material source, no toxicity, environmental friendliness, short treatment time, high sludge dehydration degree and the like.

The invention relates to the field of livestock and poultry feces treatment methods, and in particular relates to a deep dehydration recycling method for livestock and poultry feces. The method specifically comprises the following steps: adjusting the pH value of the livestock and poultry feces to be 2-4, adding ferrite or ferric salt into the livestock and poultry feces with the adjusted pH value, uniformly stirring, subsequently adding hydrogen peroxide into the livestock and poultry feces, stirring for 50-180 minutes, adding a phosphorus curing agent into the treated livestock and poultry feces, adjusting the pH value to be 8.5-10.5, uniformly stirring, and performing filter pressing on the treated livestock and poultry feces by a filer press for dehydration. The method is high in speed, short in period, high in solid recycling rate, high in dehydration degree, low in energy consumption and low in cost.

A semi-drying method of a washing machine, and a ventilating structure and a control apparatus for the same. In the semi-drying method, the dehydration and disentanglement of cloth are repeated plural times, and a washing tub is rotated at a designated dehydration speed for a time longer than that of the conventional dehydrating operation so as to minimize the jamming of the cloth into water pores of the washing tub, thereby increasing the dehydration degree of the cloth compared to the conventional dehydrating operation, removing offensive odors from the cloth, preventing damage to the cloth, allowing a user to select the duration of a semi-drying operation and to see the state of the semi-drying operation, and ventilating the washing tub during the semi-drying operation to improve the dehydration degree of the cloth.

The invention discloses an efficient inorganic environment-friendly conditioner for deep dewatering of sludge. The efficient inorganic environment-friendly conditioner comprises the following ingredients by weight percent: 5-40% of MgO, 35-65% of Ca(OH)2, 5-50% of coal ash, 1-10% of magnetite ore tail, 1-10% of Al2O3, and 1-10% of KH2PO4. The environment-friendly conditioner is added to squeeze and dewater under the condition that the organic matter content of the municipal sludge is smaller than or equal to 45%, and the dewatering effect is obvious. The efficient inorganic environment-friendly conditioner disclosed by the invention is abundant in agent raw material source, low in price, economic and environment-friendly, and less in additive amount; the general additive amount is 10-30% of weight of dry sludge matter; the change range of the pH value of the sludge is small; the original property of the sludge is not changed; the sludge can be handled according to the property of the sludge after being dewatered; a part of active heavy metal in the sludge is cured, and the sludge disposal risk in land utilization can be reduced.

The invention relates to a self-heat-supply type sludge dewatering and drying method and system. The dewatering and drying method comprises the following steps: firstly, adding a flocculation chemicalto to-be-treated sludge, and performing concentration and dewatering to obtain concentrated sludge; adding a sludge conditioner to the concentrated sludge, and stirring the sludge uniformly to obtainconditioned sludge; performing press filtration dewatering on the conditioned sludge to obtain a sludge filter cake; crushing and drying the sludge filter cake in high-temperature flue gas to obtaina dust and sludge mixture; conveying the dust and sludge mixture to a gas-solid separation device, and separating the sludge from the flue gas to obtain powdery sludge with water content being 15wt.%-20wt.%; feeding the sludge into a combustion heat supply mechanism after granulation, performing combustion to obtain high-temperature flue gas, cooling the high-temperature flue gas and conveying thehigh-temperature flue gas to a crushing and drying device. The method and the system are high in continuity and dewatering degree, the sludge treatment process is short, the operation cost is low, anexternally added heat source is not needed, so that energy cost is reduced greatly, and the sludge mass is further reduced by combustion.

The invention discloses a high-dryness conditioning and dehydrating method for sludge. A compound conditioning agent is adopted, the strong oxidizing property of an oxidant, the flocculating function and magnetic field force function of magnetic powder and the electrical neutralization of an inorganic flocculating agent are organically combined with the adsorptive bridging function and the macromolecular sweeping and trapping effects of a compression double-electron layer and an organic flocculating agent, and the advantage of each conditioning agent is brought into play in a synergetic manner, so that the sludge structure and property are improved effectively, water in sludge cells and bound water on the surface of an extracelluar polymer are released, the dehydration performance of the sludge is improved remarkably, and high-dryness dehydration is realized. The method has the advantages of high sludge dehydration degree, good flocculating effect, short flocculating and settling time, high volume reduction rate and low dehydration cost.

The invention belongs to the technical field of sludge treatment, and particularly discloses a sludge dewatering method. The method comprises the following steps: performing pre-reaction on sludge anda conditioner M; adding a flocculating agent to the pre-reaction system, and performing hydrothermal reaction under the sealed condition; finally, performing solid-liquid separation to recover waterin the pre-reaction system to obtain dry sludge. The conditioner M comprises industrial waste residues and an activator. According to the method, the content of heavy metals in water removed from thesludge is lower, and harmless treatment and reduction of the sludge are achieved.

The invention discloses a fluoride-contained crosslinked polyether demulsifier and a preparation method thereof. The fluoride-contained crosslinked polyether demulsifier is prepared by adding an initiator and potassium hydroxide to a high-temperature and high-pressure reaction vessel, heating and dehydrating in vacuum, charging propylene epoxide and ethylene oxide, performing anion block polymerizing to obtain fluoride-contained polyether, and then reacting the fluoride-contained polyether and unsaturated acid in an alkylbenzene solvent under the effects of an esterifying catalyst and the initiator. The fluoride-contained crosslinked polyether demulsifier has the characteristics of a plurality of aromatic nucleuses, a plurality of branches, and high molecular weight, is capable of effectively reducing the oil-water interface strength and achieving the purpose of completely separating oil and water, and can also be independently used as or compounded with other demulsifiers to be used as the demulsifier for dehydrating liquid produced by an oilfield and dehydrating and desalting of an oil refinery.

The invention discloses a sludge dewatering device which comprises a cavity body, a movable plunger and a movable plunger driver, wherein the movable plunger is capable of sliding in the cavity body to and fro; a group of dewatering holes are arranged on the movable plunger; a sludge pushing component which is used for preventing the dewatering holes from being blocked is arranged at the rear end of the movable plunger and the rear end is far away from the sludge; the sludge component comprises a group of ejector pins, ejector pin fixing plates and ejector pin drivers; each ejector pin is located in a corresponding dewatering hole; and the ejector pin fixing plates are used for fixing the ejector pins and driving the ejector pins to reciprocate in the dewatering holes under the driving of the ejector pin drivers. The efficient sludge dewatering device disclosed by the invention combines the advantages of plate frame type and belt type filter presses, has the advantages of rapid sludge dewatering efficiency and high dewatering degree, and is capable of finishing the circular dewatering of sludge within 2 minutes.

The invention relates to a chemical conditioning method for improving dehydration property of surplus sludge, which is characterized by comprising the following steps: putting surplus sludge in an SBR (sequencing batch reactor), stirring with an electric stirrer, carrying out hydrolytic acidification at room temperature in an two-stage control mode (alkali (pH=10.0) after acid (pH=3.0)) (8 days for each stage), and regulating the pH value with 30% HCl and 20% NaOH solution; taking a sample every two days, and storing the sample in a 4 DEG C environment; measuring sludge resistivity by a Buchner funnel method; measuring the solid content in the filter cake with a halogen quick moisture meter; and analyzing the dehydration property of the sludge regulated by acid and alkali according to the measured resistivity and the solid content of the filter cake. The method provided by the invention can improve the dehydration property of the sludge, and promote the release of abundant organic matters in the sludge; and after the sludge is recycled, the problem of insufficient carbon sources for the sewage plant can be solved, thereby lowering the routine operation cost of the sewage plant.

The invention provides an industrial sludge deep dehydration conditioning agent and a preparation method thereof, and relates to the technical field of sludge dehydration. The industrial sludge deep dehydration conditioning agent is prepared from the following raw materials: calcium oxide, silica, a coagulant, anionic polyacrylamide, citric acid and additives. The industrial sludge deep dehydration conditioning agent provided by the invention can be used for performing surface chemical modification on sludge particles, so that the water on the surfaces of the sludge particles and the bound water in capillary channels are enabled to become free water, the water can be further separated out by means of mechanical pressure filtration, and the purpose of dewatering the sludge is accordingly achieved; the conditioning agent also has a stronger absorption function, and can disperse sludge flocs and destroy the floc structure, thus improving the dehydration degree of the sludge; furthermore,the industrial sludge deep dehydration conditioner has the advantages of being non-toxic and harmless, and not causing secondary pollution to the environment.

The invention provides a poultry excrement hydrothermal treatment dewatering method which comprises the following steps: adding an oxidizing agent into fresh poultry excrement, mixing and performing hydrothermal reaction treatment; mixing the treated poultry excrement with a proper amount of water, then dewatering to finish the treatment on the poultry excrement. The poultry excrement hydrothermaltreatment dewatering method can perform dewatering treatment on the poultry excrement and has the advantages that equipment is simple and easy to operate, a treating speed is quick, a period is short, a dewatering degree is high, a solid recovery rate is high, energy consumption is low, cost is low, and a wide application prospect is achieved.

The invention discloses a using method of a sour crude oil emulsion breaker. The problem that the ideal emulsion breaking effect cannot be achieved even when an existing emulsion breaker using amount is large is solved. The method comprises the steps that 1, a crude oil composite emulsion breaker is prepared, wherein the crude oil composite emulsion breaker is prepared from 48-52 wt% of polyoxyethylene polypropylene oxide block polyether, 0.8-1.2 wt% of sodium hexadecyl sulfonate, 5-8 wt% of d-Limonene, 10-15 wt% of C2-C6 carboxylic acid, and the balance water; 2, the crude oil composite emulsion breaker is added into crude oil according to the addition amount of 5-10 ppm. The method has the advantages of lowering the consumption amount and effectively improving the dehydration effect.

The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge heat treatment recycling process which comprises the following steps: S1, preheating sludge, S2,carrying out heat treatment, S3, cooling, S4, dehydrating, and S5, carrying out compression molding. According to the sludge heat treatment recycling process, the sludge is deeply dewatered, the effects of disintegrating the sludge and improving organic matter dissolution can be achieved, and therefore the phosphorus release capacity of the sludge is improved, the pH value of a sludge system aftertreatment is 7, a treatment container is not corroded, and the salinity in the system cannot be improved. The process can be used for effectively sterilizing, killing germs in sludge and inhibiting fermentation microorganisms from generating a large amount of acidic biogas, so that pipeline equipment is corroded and damaged, and the burst risk caused by more biogas is avoided.

The invention provides an oil sludge water heat treatment separation and recovery system and method. The system comprises a hydrothermal reactor, a flash condensation tank and an oil-water separator,wherein the hydrothermal reactor is provided with a material inlet, a discharge port and a gas outlet, the discharge port of the hydrothermal reactor is located at the lower part of the hydrothermal reactor, and the gas outlet of the hydrothermal reactor is located at the upper part of the hydrothermal reactor; the flash condensation tank is provided with a material inlet, a liquid outlet and a gas outlet; a liquid outlet of the flash condensation tank is positioned at the lower part of the flash condensation tank; a gas outlet of the flash condensation tank is positioned at the upper part ofthe flash condensation tank; the oil-water separator is provided with a material inlet, a water phase outlet and an oil phase outlet; a gas outlet of the hydrothermal reactor is connected with a material inlet of the flash evaporation condensation tank, and a liquid outlet of the flash evaporation condensation tank is connected with a material inlet of the oil-water separator. The system is suitable for heat treatment separation and recovery of oily sludge water, and can effectively realize separation of water, oil and solid-phase residues in oily sludge.

The invention relates to modified polyether, a composite crude oil demulsifier, and a preparation method and application of the composite crude oil demulsifier. The preparation method of the modifiedpolyether comprises the following steps: sealing and preheating phenols and vinylamine at 50-70 DEG C under normal pressure for 30-50 minutes, heating to 110-130 DEG C within 30-60 minutes in an N2 orinert atmosphere at a stirring speed, dropwise adding a formaldehyde aqueous solution, heating to 0.2-0.6 MPa, reacting for 2-5 hours at a constant temperature of 110-130 DEG C, adding alkali into the first intermediate product under the condition of keeping the previous stirring rotation speed, dropwise adding an epoxy alkyl compound aqueous solution under the conditions of 0.2-0.6 MPa and 110-130 DEG C, carrying out constant-temperature and constant-pressure stirring reaction for 5-7 hours, cooling to 70-90 DEG C, reducing the pressure to normal pressure, cooling to room temperature, and neutralizing and purifying to obtain the modified polyether. According to the composite crude oil demulsifier provided by the invention, the used raw materials are wide in source and low in cost, and subsequent oil refining equipment is not corroded, so that the cost can be saved, and the utilization rate of the equipment is improved.