55results about How to "Close the loop" patented technology

The invention provides a process and device for carrying out stage dry distillation on oil shale under the state of full recycle, with the gas as the heat carrier. The oil shale is divided into three different sizes (such as 0-6mm, 6-20mm and 20-50mm) through crushing and screening, and the oil shale is firstly dried and heated to the temperature between 50 DEG C and 150 DEG C by the waste smoke exhausted from gas heating furnaces and then enters into the different sizes of furnaces for dry distillation to undergo dry distillation. After being treated by water spraying and an indirect cooling tower, a rotary trapper and an electric trapper for oil collection, the dry distillation oil and gas undergo oil-gas-water separation, and after separation, the oil enters into a storage tank, the water enters into a circulating water tank and the first part of gases serves as the heat carrier and is recycled, the second part of gases is used as the fuels for the heating furnaces and the third part of gases is used as the fuel gases for power generation.

The invention discloses a method for recycling heavy metal pollution wastes, which comprises the following steps of: 1) the pulping of raw materials; 2) acid leaching, namely, adding pulp obtained in the step 1 into a dilute sulphuric acid for filtration, and taking filter residues as the raw materials of bricks or cement; 3) copper displacement, namely, displacing copper out of filtrate in the step 2 with iron; 4) the preparation of ferrum-chrome-alum, namely, adding alkaline substances and an oxidant into the filtrate obtained in the step 3, adjusting a PH value, and precipitating and filter-pressing the mixed solution to obtain the ferrum-chrome-alum; and 5) the preparation of sponge cadmium, namely, displacing cadmium out of the filtrate obtained in the step 4 with zinc. The process has the advantages of suitability for the treatment of waste residues and waste liquor in a plurality of industries of electroplating, surface treatment, heavy metal smelting, chemical engineering and the like, no need of heating liquid-phase materials, the realization of closed cycle, and the capacity of extracting a plurality of valuable metals, such as Cu, Cr, Cd, Ni, Co, Zn and the like, directly taking the wastes obtained after the metal separation as the raw materials of the bricks or cement, and saving coal and electricity amounting to 20,000 T standard coal and 40,000-ton water per year for enterprises recycling 5,000-ton metals per year.

This invention provides a solvent circulate extraction of gutta percha, and the ligarine is used for extraction of gutta percha from folium eucommiae or skin eucommiae. Its craft includes: (1)The raw material is through circulation drying in baking oven, and then shatterred by crusher, cribration. (2)The ligarine is added in accordance with dosage liquor ratio, refluxing in hot bath water. (3)Filtering as hot as possible, segregating its dregs and collecting the filtrate. (4)The filtrate is filtered after water cooling and hypothermy cold storage to reclaim gutta percha solid and filtrate separately. (5)The filtrate degelatinized mixes again with dregs, and then refluxing. (6)Crude product is obtained by combining gutta percha after conducting repetitive operation twice. (7)The ligarine reclaimed still can be used for extraction of gutta percha.

The invention provides a recycling method for waste acid generated during the preparation of graphite oxide through the liquid-phase chemical method. The method comprises the steps of homogenizing the waste acid: pumping the waste acid into a homogenization tank by an acid-resistant pump to homogenize the waste acid; recycling sulfate: adding a precipitant in the homogenization tank according to the molar weight of sulfate ions in the waste acid, conducting the stirring reaction and recycling gypsum (CaSO4*2H2O); recycling manganese ions: adding an inorganic base to adjust the pH value so as to form a manganese hydroxide, then adding an oxidant to react with the manganese hydroxide so as to form a manganese oxide, recycling the manganese hydroxide/manganese oxide or the mixture of the manganese hydroxide and the manganese oxide; conducting the separation and purification operation; recycling chloride ions; and recycling the water. Conventional methods for preparing graphene are mainly divided into physical methods and chemical methods. The physical methods are composed of a micro-mechanical stripping method, a high-energy ball milling method and the like. The above methods are low in yield and are not suitable for large scale production. The method of the present invention is applied to the clean production of graphite oxide and the comprehensive utilization of waste acid resources.

The invention discloses a dechlorination method of a zinc sulfate solution, which comprises the steps that sulfuric acid is added to a zinc sulfate solution containing 100-150g/L zinc and 0.5-5.0g/L chlorine; an acid solution with the sulfuric acid concentration of 20-75g/L is obtained; the acid solution is subjected to selective electrodialysis in four diaphragm electrolytic cells at a room temperature and at the current density of 50-200A/m<2>; a low-chlorine solution containing 0.1-0.3g/L chlorine and a high-chlorine solution containing 5-20g/L chlorine are obtained; the low-chlorine solution is used for producing electric zinc; the high-chlorine solution is subjected to chlorine precipitation by a cuprous chloride method; a chlorine precipitation solution containing 0.4-1.0g/L chlorine is obtained; zinc powder is added to the chlorine precipitation solution for replacing and removing copper; a copper removal solution containing 0.4-1.0g/L chlorine is produced; the copper removal solution is returned for acid addition, and subjected to the selective electrodialysis. With the adoption of the method, chloride ions in the zinc sulfate solution can be removed at low cost and high efficiency.

The invention relates to a treatment method of lignin production waste water, which comprises the following steps of: treating and recovering lignin residues in lignin waste water through a gas floatation method at first; respectively feeding gas floatation water and condensate water in a multi-effect evaporation stage into an electro-osmosis desalting device to obtain lignin waste water containing no salt basically and highly saline concentrated water; and recovering the lignin waste water containing no salt basically as supplementary water in the lignin production process, feeding the highly saline concentrated water into a multi-effect evaporation device to concentrate and crystallize, recovering the obtained evaporation condensate water in the electro-osmosis desalting device, and directly selling the obtained high-purity solid salt. Due to the process, resource recycling of waste water is realized; closed cycle of water is realized, so that the pollution abatement cost is reduced; organic combination of the electro-osmosis technology, multi-effect evaporation and the crystallization technology is sufficiently embodied; and the treatment method disclosed by the invention is a high-efficiency and economical treatment method.

The present invention relates to a wastewater treatment method of decanedioic acid production and special extraction plant. The method includes solid and liquor separation in a sedimentation pond, neutralization process pH value regulating, extracting agent extracting forbidden discharge matters and separation between the forbidden discharge matters and discharge water. The key scheme of the method is that a ricinoleic acid is adopted as the extracting agent to extract and separate the forbidden discharge matter hydroxybenzene in the wastewater of decanedioic acid production and the detail step of combined and repeat application of the extracting agent and the extractive matters is adopted. A matched special extraction plant is applied to carry through the operation of multilevel extracting forbidden discharge matters to realize the closed recycling of the forbidden discharge matters in a production system. The extraction plant consists of an extraction separation chamber, a compound emulsification pump arranged between two neighboring or interphase extraction separation chambers and a pipeline connected between the compound emulsification pump and the extraction separation chambers at two sizes that are arranged in order. An oil inlet of each matched compound emulsification pump is communicated with a fat phase exit of the back level extraction separation chamber. An inlet is communicated with a water phase exit of the front level extraction separation chamber. An exit of the compound emulsification is communicated with a fluid infusion opening extracted from a flow regulation chamber of the front level extraction separation chamber.

The invention discloses an industrial boiler for burning bio-briquettes. A front arch and a rear arch of which the front part is in an interdigitated shape are arranged in a body of the boiler; upper edges of two adjacent interdigitated parts of the rear arch are provided with corresponding grooves; a check block is arranged between two adjacent interdigitated parts; and two sides of the check block are fixedly connected with rotating shafts which are respectively arranged in the corresponding grooves. Furthermore, a figure-7 partition laminate is arranged above the rear arch; a movable division door is arranged between the rear end of the partition laminate and the rear arch; a circulating air pipe is connected with an air inlet of a draught fan outside the body through an air pipe; the air outlet of the draught fan is connected with a last-stage air bin of a chain grate; and a secondary air pipe at the air inlet on the side wall of a third combustion chamber is deflected toward the lower rear part, and is communicated with a main secondary air pipe outside the body. The industrial boiler has the advantages that: the bio-briquettes are efficiently and stably combusted; the boiler is started at a high speed and has high heat efficiency; black smoke is not generated when the boiler is started; and the integral delivery of the boiler can also be realized.

An aerobic granular sludge integrated sewage treating device is disclosed. The device comprises a water feeding pipe, aeration systems and a sludge discharging perforated pipe. The device also comprises a cylindrical tank body. The center of the cylindrical tank body is provided with a cone reaction drum. The periphery of the cone reaction drum is provided with cylindrical separation plates. The cone reaction drum is the first reaction chamber. The space between the cone reaction drum and the cylindrical separation plates is the second reaction chamber. The space between the cylindrical separation plates and the cylindrical tank body is the third reaction chamber. Each reaction chamber is provided with a plurality of layers of mesh plates which are arranged horizontally. The bottom of the cone reaction drum is provided with a water-gas mixing short pipe. The water-gas mixing short pipe is connected to a gas feeding pipe. The lower end of the water-gas mixing short pipe is provided with a frustum cone-like water feeding cavity. The outlet of the water feeing pipe is horizontally arranged, is in the frustum cone-like water feeding cavity, and is provided with a nozzle. The lower end of the cylindrical tank body is provided with a cone. The bottom of the cone is connected to the sludge discharging perforated pipe. The top edge of the inner wall of the cylindrical tank body is provided with a water discharging groove. The device has characteristics of simple configuration, construction convenience, small occupied space, convenient running, good quality of discharged water, low manufacturing cost, and low running cost.

The invention discloses a photovoltaic time-controlled automatic irrigation system which comprises a photovoltaic device, an irrigation device, an irrigation pipeline, a switching assembly and a control device, wherein the photovoltaic device comprises a photovoltaic assembly, an accumulator, an inverter, a frequency converter and a voltage booster; the irrigation device comprises a water storage container; the irrigation pipeline is connected with an external water source and the water storage container, so as to irrigate; the switching assembly is arranged on the irrigation pipeline, and different water flow paths are formed in the irrigation pipeline by opening and closing the switching assembly; the control device comprises a controller and a microcomputer time-controlled switch, the controller is used for controlling the switching assembly to open or close, power is supplied to the irrigation device and the control device by the photovoltaic device, and the microcomputer time-controlled switch is connected to the controller, so as to control the irrigation device to start and stop in multiple time periods. According to the photovoltaic time-controlled automatic irrigation system, solar energy is reasonably utilized, and unattended operation, automatic energy supply, closed cycle and automatic irrigation of crops are realized.

The technological process of treating sewage into pure water is completed in a pre-treating unit, a reverse osmosis unit and an electric desalting unit, and features that collected sewage is first treated in the pre-treating unit through its multiple medium filter, ultrafilter and active carbon filter, then treated in the reverse osmosis unit with double-stage reverse osmosis device, and finally electrically desalted in the electric desalting unit to obtain pure water. The technological process can treat sewage into pure water in high efficiency, and may be used in industrial production to realize the closed circulation of sewage to lower the water resource consumption greatly.

The invention relates to a treatment method for resource utilization of waste liquid in production of graphene oxide. The treatment method comprises the following steps of (1) pretreating the wastewater, so as to obtain wastewater A; (2) evaporating and crystallizing the wastewater A, and filtering, so as to obtain crystals, condensate water I and wastewater B; washing and drying the crystals, soas to obtain manganese sulfate crystals; (3) distilling and concentrating the wastewater B under a vacuum condition, so as to obtain condensate water II and recycled acid; returning the condensate water I, the condensate water II and the recycled acid back into the production technology for recycling. The treatment method for the resource utilization of the waste liquid in the production of the graphene oxide has the advantages that the characteristic of dissolving degree of the manganese sulfate in sulfuric acid is utilized, and the crystals are removed by the evaporation and crystallizationtechnology, so as to obtain the manganese sulfate; the obtained wastewater in the separating process is concentrated into finished acid, and the finished acid and the condensate water produced in theevaporation process are returned back into the production process for recycling, so as to realize the purposes of zero drainage and high-efficiency recycling of the wastewater in the production process of the graphene oxide.

The invention relates to the technical field of copper waste liquid electrolysis recovery devices, in particular to an electrolysis recovery device for copper-containing waste liquid of a printed circuit board. The electrolysis recovery device comprises a pretreatment unit and an electrolysis unit, wherein the pretreatment unit comprise a header tank, a blow-off pipe and a chemical adding pipe, aheating plate and stirring blades are installed at the bottom of the header tank, the blow-off pipe is connected with the header tank in a penetrating manner, the chemical adding pipe is installed atthe top of the header tank, a nanofiltration membrane is arranged between a concentration cavity and a circulating cavity, the electrolysis unit comprises a tubular electrolytic cell and a power supply, a base is arranged in the tubular electrolytic cell and used for placing an anode metal bar and a cathode metal bar, and the anode metal bar and the cathode metal bar are electrically connected with the power supply to form a closed loop. According to the electrolysis recovery device for the copper-containing waste liquid of the printed circuit board, the problems of lower recovery rate, shortcontact time and low replacement efficiency of the copper-containing waste liquid of the printed circuit board in the prior art are solved, and an electrolysis recovery device has the advantages of high electrolysis efficiency, high recycling material utilization rate and high replacement efficiency.

The invention discloses a system for recycling waste heat of a nuclear power plant. The system comprises a nuclear power plant steam condenser (1) and further comprises a heat pump system (2) and a heat use system (3). The cooling water output end of the steam condenser (1) is connected with the input end of the evaporation side of the heat pump system (2), and the cooling water input end of the steam condenser (1) is connected with the output end of the evaporation side of the heat pump system (2). The hot water supply input end of the heat use system (3) is connected with the output end of the condensation side of the heat pump system (2), and the hot water supply output end of the heat use system (3) is connected with the input end of the condensation side of the heat pump system (2). The heat pump system is directly connected with a cooling water way of the steam condenser, closed circulation of cooling water is achieved, on one hand, recycling of the heat is achieved, and on the other hand, output of the heat is reduced, and heat pollution to the environment is avoided.

The invention discloses a method for achieving filter liquor circulation, recovering waste lead plaster through a wet process and preparing high-purity red lead and relates to the technical field of waste lead-acid cell lead plaster wet process recovery and red lead preparation. The method comprises the following steps that 1, organic acid salt, organic acid and reducer mixed liquor are utilized for leaching out the waste lead plaster, and after solid and liquid are separated, lixivium is obtained; 2, a carbonate solution is added to the lixivium, the reaction pH is regulated, and solid and liquid separating is carried out to obtain lead carbonate sediment and filter liquor; and 3, lead carbonate is roasted in the aerobic atmosphere, and the high-purity red lead with low impurity content is prepared. The prepared red lead product is high in purity and low in impurity content, the content of main impurities Ba and Fe is smaller than 10 mg/kg, the content of Cu, Zn and Al impurity elements is smaller than 1 mg/kg, the filter liquor can achieve closed circulation of organic acid radical ligand in a leaching system, and the use efficiency of a leaching agent is improved remarkably.

The present invention discloses a method for treating waste water produced by p-aminophenol process by electrolysis method. Said method adopts the fruit shell active carbon to make adsorption to remove P-aminophenol, then makes the waste water be evaporated and concentrated to recover industrial-grade ammonium sulfate, the recovery rate of the ammonium sulfate is greater than 98%. The evaporation-obtained water can be used for preparing sulfuric acid aqueous solution whose concentration is 18%, and can be used as electrolyte and fed into electrolytic bath to implement closed circulation of water. The fruit shell active carbon in which the p-aminophenol is adsorbed can be regenerated by using 18 wt% sulfuric acid aqueous solution as desorption agent, and the desorption liquid can be returned into electrolytic bath to participate in electrolysis reaction.