37results about How to "Reduce the cost of dosing" patented technology

The invention relates to the field of technologies for treating environmental engineering wastewater, in particular to a method and a system for treating desulfurization wastewater in a zero-discharge manner on the basis of electrodialysis. The method and the system have the advantages that electrodialysis concentrated water is regulated and distributed into a bipolar membrane electrodialyzer and a flue evaporating apparatus in membrane treatment phases, acid and alkali can be manufactured by the bipolar membrane electrodialyzer and flow back for pretreatment and membrane treatment, and accordingly the wastewater can be reduced and recycled; electrodialysis fresh water flows back for membrane treatment, accordingly, the reuse rate of the fresh water can be increased, the pretreatment chemical feeding cost and chemical preparation workload can be reduced, and desalting load and tail-end evaporation crystallization load on the system can be integrally relieved; tail-end treatment of the system is effectively regulated, accordingly, the method and the system can cope with different types of variation of water quality and water volumes of power plants, and the integral system can assuredly stably run; zero-discharge effects are realized by the system for treating the desulfurization wastewater, environment-friendly design requirements on treating waste by the aid of waste can be met, and the method and the system have broad application prospects.

The invention discloses an advanced wastewater treatment technology for sewage treatment and upgrading and reconstruction. The advanced wastewater treatment technology is a combined technology of an efficient settling basin and a riser fiber filter cloth filter tank added between a secondary sedimentation tank and a disinfecting tank of the original process of a sewage treatment plant; an efficient sedimentation tank is composed of two modules of a quick mixing region and an efficient sedimentation region; a FeCl3 chemical is fed to the quick mixing region so as to be agitated to react with sewage; the adding amount of the FeCl3 chemical is 5-8mg/L; the standing time of the quick mixing region is 1.5-2 minutes; the standing time of the efficient sedimentation region is 15-20 minutes; the standing time of the riser fiber filter cloth filter tank is 8-12 minutes; effluent of the secondary sedimentation tank is firstly processed by the efficient sedimentation tank, and then processed by the riser fiber filter cloth filter tank, finally achieves the first level A of discharge standard for sewage treatment after passing through the disinfecting tank. By adopting the advanced wastewater treatment technology, the problems that the efficient sedimentation tank process is independently used, so that effluent SS is unstable, and the filter cloth filter tank is independently used and thus phosphorus cannot be removed are effectively solved, a flocculating agent does not need to be excessively fed again, the dosing cost is greatly reduced, and fouling on an online monitoring instrument probe caused by feeding polyacrylamide (PAM) is avoided.

The invention relates to sewage treatment, and discloses a desulfurization wastewater treatment method. In the present invention, the organic sulfur in the reaction box and the coagulant in the flocculation box are disabled. The coagulation aid is directly added to the desulfurization wastewater adjusted by the pH value. At the same time, the dosing port and dosing position are adjusted. The dispersed suspended particles in the desulfurization wastewater are condensed into larger flocs. After passing through the clarification and concentration tank, impurities such as heavy metals in the wastewater are deposited at the bottom of the tank, and the upper layer of clear water overflows to the neutralization tank. Further, stop using sodium hypochlorite and hydrochloric acid in the neutralization box, move the dosing point of sodium hydroxide from the pH adjustment box to the reduction box, and move the dosing point of the coagulant from the flocculation box to the reaction box to Reduce the types of chemicals that need to be added in the treatment of desulfurization wastewater, reduce the complexity of dosing, avoid affecting the effluent quality of desulfurization wastewater due to excessive dosing, and also reduce the cost of dosing.

The invention provides a film method drinking water treatment equipment and a treatment method thereof. According to the treatment equipment of the invention, the film method drinking water treatment equipment comprises: a pretreatment unit, a coagulation tank and a film separation tank; a wide grille and a Y-shaped pipeline filter, etc. are arranged in the pretreatment unit for pre-treating the raw water and avoiding the blockage to a water pump and an inlet water meter by impurities in the raw water; the coagulation tank is a mechanical coagulation tank for coagulating the raw water; and the film separation tank adopts a curtain type membrane module structure to filter the raw water. The raw water is put with a coagulant after going through the pretreatment unit and then enters the coagulation tank, and the water treated by coagulation is treated by components of the curtain type membrane module. The drinking water treatment equipment adopts the combination of coagulation and membrane filtration to treat the micro-polluted surface water, and can fully prevent bacteria and effectively remove various suspended particles, bacteria, algae, COD and organic matters in water, thereby ensuring the excellent water quality with nearly zero water suspended substance.

The invention discloses a resource utilization zero-emission recycling process method of a chemical waste nickel liquid. The resource utilization zero-emission recycling process method is characterized by comprising the following steps: I, concentrating and separating the chemical waste nickel liquid, namely, adjusting the pH value of the chemical waste nickel liquid to be 3-5, performing low-temperature negative pressure evaporation concentration, and rising the temperature to 95-110 DEG C, wherein the negative pressure condition is minus 0.09 - minus 0.1MPa and the boiling temperature is not greater than 70 DEG C; II, separating sodium sulfate by an acid solution, namely, performing slow soaking dissolution on chemical nickel residues by a sulfuric acid solution in stirring so as to obtain a sulfuric acid leaching agent; after sufficient cooling, and performing filtration to obtain filtrate and sodium sulfate crystal; III, extracting and separating nickel sulfate, namely, adding ethanol into the filtrate, leaving to stand to layer, and performing solid-separation separation so as to obtain nickel sulfate solid for resource recycling and reuse; IV, recycling ethanol. By adopting the resource utilization zero-emission recycling process method disclosed by the invention, the chemical solid nickel waste can be completely recycled, the requirements of environment-friendliness of waste liquid recycling and zero emission are met indeed, and the required social environment capacity is greatly reduced.

The invention discloses a recycling treatment process for thermal power plant desulfurization wastewater. The process includes: 1) subjecting desulfurization wastewater to triple box treatment, and then letting the treated wastewater enter a pre-sedimentation tank; 2) adding NaOH and letting it overflow into a 1# reaction tank to undergo reaction; 3) letting the effluent water of the 1# reaction tank enter a concentration tank, transporting the feed liquid in the concentration tank into a TMF system for filtering, returning the formed Mg(OH)2 to the concentration tank, and discharging Mg(OH)2 into a 2# reaction tank; 4) letting the TMF system produced water enter a seed crystal tank, outputting the waste liquid to a hydrocyclone, and making the clear liquid obtained by the hydrocyclone enter a nanofiltration system; 5) returning the concentrated liquid obtained by the nanofiltration system to the seed crystal tank, making the dialysate enter a reverse osmosis system, and conducting electric treatment on the obtained concentrated liquid; and 6) subjecting the MgCl2 feed liquid formed in the 2# reaction tank to evaporative crystallization to form MgCl2 crystals, and then conducting re-drying to obtain anhydrous MgCl2, and carrying out electrolytic treatment on the anhydrous MgCl2 to obtain elemental Mg and Cl2. The "chemical reaction+TMF system+seed crystal tank+hydrocyclone+nanofiltration system+reverse osmosis system+bipolar membrane" process involved in the invention can reuse 90% or more of water, and can utilize Mg, CaSO4 and NaCl in wastewater.

The invention discloses a method and a device for recycling high-magnesium wastewater from power plants and belongs to the technical field of water treatment. The method for recycling high-magnesium wastewater from power plants comprises the following steps: softening and removing calcium; adjusting compositions; nano-filtering and separating salt; concentrating and crystallizing. The device for recycling high-magnesium wastewater from power plants comprises a softening pretreatment system, a composition adjusting system, a nano-filtering and salt-separating system, a reverse osmosis concentration system and an evaporative crystallization system which are connected with each other in turn along a flowing direction of wastewater. According to the method for recycling high-magnesium wastewater from power plants disclosed by the invention, calcium ions in water can be effectively removed, magnesium ions can be fully utilized and dosing cost of pretreatment can be greatly lowered. Sodium chloride products and magnesium sulfate products acquired by utilizing the method and device provided by the invention are high in purity and high in recovery rate.

The invention utilizes a recycling technology performing drying treatment of raw sludge by using sludge subjected to chemical drying treatment. By recycling treated sludge, the raw sludge can be evenly and well mixed with a composite reagent in the treatment process, and good effect is played on moisture removal. The treatment process comprises the steps of 1 using chemical drying to treat the sludge and fully mixing the sludge and the composite reagent; 2 performing air-curing and smashing; enabling the moisture content to be reduced to be 30-40% after the sludge subjected to chemical drying is dried naturally, using a sludge smashing device to smash sludge cakes into 0.5-1mm of powder-like particles, and smashing the sludge particles to be approximate to power after further drying; and 3 performing circulating input, mixing power obtained through the drying and smashing and an early-added reagent in the composite reagent, further adding other reagents in the composite reagent and then performing the circular process. The system for recycling the sludge subjected to chemical drying takes the sludge treatment cost and treatment effect as main factors and reduces secondary environment pollution.

The invention relates to a desulfurization wastewater softening and membrane concentration method. The method comprises the following steps: pumping desulfurization wastewater into a raw water tank for storage and water quantity adjustment; carrying out microfiltration on the wastewater; enabling the filtered produced water to flow into a dosing settling tank, and adding a combined organic medicament into the dosing settling tank so as to soften the water quality of the produced water in the dosing settling tank; discharging the bottom mud in the dosing tank, and carrying out vacuum filter pressing on the bottom mud; pumping the supernate into a buffer tank; filtering water discharged from the buffer tank; adding a scale inhibitor into the filtered pipeline and mixing; and pumping the mixed solution into a nanofiltration membrane for filtering to obtain produced water and concentrated water of the nanofiltration membrane. The desulfurization wastewater softening and membrane concentration method disclosed by the invention has the advantages that calcium ions are complexed and precipitated, the removal rate of magnesium ions is relatively low, the magnesium ions and chloride ions and sulfate ions in the wastewater are not precipitated under an acidic condition, and the membrane is not polluted and blocked, so that a large amount of dosing cost can be reduced.

The invention discloses a multifunctional combined coal-containing wastewater treatment method and a device. The device disclosed by the invention comprises an adsorption coagulating sedimentation system, a multifunctional combined processing system, a fiber bundle filtering system, a reuse water/backwashing system and a combined dosing system. The adsorption coagulating sedimentation system is directly connected with the multifunctional combined processing system; the multifunctional combined processing system comprises a pipeline mixer and a multifunctional combined purifier which are connected through a pipeline, the multifunctional combined treatment system is connected with the combined dosing system through the pipeline mixer, and the multifunctional combined treatment system is sequentially connected with the fiber bundle filtering system and the reuse water/backwashing system through the multifunctional combined purifier; coal-containing wastewater is treated in the device disclosed by the invention. The method and the device have the advantages of low construction investment and good treatment effect, and the effluent can satisfy the national and power industry requirements for treating and recycling the coal-containing wastewater.

The invention discloses a treatment process of low-temperature and low-turbidity water with over-standard ferro-manganese. The treatment process comprises the following steps: carrying out water-source water floatation treatment, adding a water-source water reaction nucleus, adding quicklime powder at a water inlet of water-source water, adding an oxidizing agent into a water inlet pipeline of the water-source water, and additionally arranging a water-source water automatic control system. The process has the advantages that suspended solids (SS) can be effectively removed; 2, total phosphorus is effectively removed; 3, water source water oxygen ions are effectively increased, and CO2 is reduced; 4, the total nitrogen is effectively removed under the action of increasing oxygen and an oxidizing agent; 5, iron and manganese are effectively removed under the oxidation effect; 6, the turbidity value is effectively reduced and can be controlled to be about 1NTU; 7, the filtering efficiency of the filter tank and the yield are improved; 8, the labor intensity of workers is reduced; 9, the quality of outgoing water can be effectively improved; 10, water resources can be effectively saved; 11, the improvement of the system makes up the production shortages of the existing running waterworks; 12, the investment is saved, the effect is quick, and the existing water treatment process is combined, so that the energy consumption is basically avoided.