30results about How to "Reduce water treatment costs" patented technology

A fluidized bed boiler plant and a method of combusting sulfurous fuel in the fluidized bed boiler plant, a furnace of which plant is provided with a fluidized bed of particles. Sulfurous fuel, CaCO3-containing sulphur-binding agent and combusting air are introduced to the bed of particles, whereby fuel burns and generates flue gases and the sulphur-binding agent calcinates to CaO and binds SO2 generated in the combustion. Energy is recovered to a heat exchange medium circulating in heat exchange tubes of a condensing heat exchanger arranged in a flue gas channel, and a water solution of acid condensing on outer surfaces is neutralized by mixing it in a mixing vessel to a CaO-containing ash from a plant, preferably, fly ash collected by a dust separator.

The invention relates to a water purification and regeneration device based on rotary spray evaporation and application of the device. The device and a technique applied to the device are suitable for the fields of wastewater treatment and seawater desalination and in particular suitable for concentrated wastewater treatment and water purification of ultra-difficultly treated wastewater and strong brine generated after seawater desalination. The device is a water purification and regeneration device consisting of a raw water pretreatment pool, a centrifugal rotary spray device, a gas-water separator, a heat exchanger unit, a water deep treatment device and the like. The raw water is heated by using waste heat in a plant or converting natural energy obtained in a low-price mode into heat energy; and the raw water entering into a spray drying device is just subjected to coarse filtration and neutralization as well as atomization separation in the centrifugal rotary spray device, so thatthe traditional wastewater treatment process and seawater desalination technology are changed, chemical regents added in wastewater treatment and seawater desalination processes are reduced, secondary pollution is avoided, treatment time is shortened, treatment cost of per ton of water is lowered, the recycling of energy and resources and zero emission of pollutants are achieved, and the dual purposes of clean production and energy conservation and emission reduction are realized. Thus, the device has wide popularization prospect and application value.

The invention discloses a method and a device for urging snails to spit out sediment. The device for urging snails to spit out sediment is provided with a box body, a water distribution pipe, a static bed, an overflow plate, a settling tank and a water circulation system; the device for urging snails to spit out sediment The method is to place a static bed in the box, then add snails to the static bed, and evenly arrange the snails. After installing the snails, open the tap water valve and slowly add tap water. The water storage height is 45-50cm; then continue to slowly add tap water to the circulating water valve Overflow; or start the circulation pump; control the water temperature at 15-30°C; add emetic salt and 2-methyl-3-mercaptofuran to the storage water when the snails are left to spit sand, and replace the equipment every 3 hours Store water in the middle, and increase the water flow to take away the sediment. The invention can clean up the mud and sand in the body of the snail within 8 hours, increases the time for the snail to spit out the sand several times, has remarkable effect, and is suitable for industrialized production.

The invention belongs to the technical field of a method for preparing high-purity biodiesel, and in particular relates to a method for purifying biodiesel capable of purifying and producing the biodiesel by utilizing an absorbent resin. The biodiesel is purified and produced by utilizing the absorbent resin, so that the vices of the conventional purification method can be overcome, the purity of the biodiesel is increased greatly, and the recovery rate and the purity of methanol and glycerin can be improved.

The invention relates to a method for reuse of reclaimed water in circulating cooling water. The method comprises the steps of: (1) filtering reclaimed water and taking the filtered reclaimed water as make-up water of circulating cooling water; (2) adding a scale and corrosion inhibitor into the circulating cooling water, with the scale and corrosion inhibitor containing: A) polyaspartic acid and / or polyepoxysuccinic acid; B) a phosphorus-free copolymer containing a carboxylic acid group; C) a zinc salt and optionally D) a copper corrosion inhibitor; and (3) adding a bactericide and a nonionic surfactant into the circulating cooling water before and / or at the same time of and / or after adding the scale and corrosion inhibitor into the circulating cooling water. According to the method, the use of the reclaimed water as the make-up water of circulating cooling water in a circulating cooling water system can prevent the formation of calcium phosphate scale and the generation of corrosion and biological slime. Therefore, the use of the reclaimed water as the make-up water of circulating cooling water is effective.

The invention relates to an inorganic-organic composite flocculant made of polymeric aluminum and a modified compound biological flocculant and a method for preparing the inorganic-organic composite flocculant. The inorganic-organic composite flocculant is made by reaction of mixture of aluminum chloride and the modified compound biological flocculant according to the mass ratio of 1-8:1. The aluminum chloride is made by steps: dissolving AlCl3 6H2O raw material into distilled water, adding Na2CO3 for adjusting alkalinization level, and reacting at the normal temperature to obtain the aluminum chloride. The MCBF (modified compound biological flocculant) is made by graft copolymerization of compound biological flocculant, acrylamide and dimethyl diallyl ammonium chloride in initiator existence of potassium persulfate and sodium sulfite. The inorganic-organic composite flocculant integrates the advantage of high product stability of the MCBF and the advantages of wide feeding range, low water treatment cost and the like of the polymeric aluminum, can be widely used for fields of water supply wastewater treatment, papermaking, textile dyeing, daily chemicals and the like, and has fine water treatment effect.