165results about How to "Low water quality requirements" patented technology

The invention relates to an offset printing fountain solution composition containing composite buffer system, which contains two buffer systems, wherein one of the buffer systems comprises citric acid and M2(I)HPO4, and in the molecular formula M2(I)HPO4, M is K plus, Na plus or NH4 plus ion; and the other buffer system comprises citric acid and potassium citrate, sodium citrate or ammonium citrate, components are as follows in percentage by weight: 1.0-10 percent of the citric acid, 1.0-10 percent of K2HPO4, Na2HPO4 or (NH4)2HPO4, 1.0-10 percent of the potassium citrate, the sodium citrate or the ammonium citrate, and the balance water. When 1 percent to 5 percent by weight of working solution prepared with the diluted fountain solution is used for printing, the change of pH value is less than 0.35, and when 1 percent to 2 percent of working solution is prepared, the change of pH value is less than 0.25. The ultrahigh buffering property of the fountain solution can significantly help to improve adaptability and tolerance during high-speed printing operation.

The invention discloses reusable slippery water fracturing fluid for a shale oil and gas reservoir. The reusable slippery water fracturing fluid for the shale oil and gas reservoir comprises the following components in percentage by weight: 0.02 to 0.08 percent of a resistance reducing agent, 0.7 to 1.5 percent of a discharge aid, 8 to 12 percent of an auxiliary discharge aid, 5 to 10 percent of an interfacial tension-reducing synergist, 0.05 to 0.1 percent of a clay stabilizer, 0.007 to 0.01 percent of a sterilizing agent, 0.04 to 0.06 percent of a scale inhibitor and the balance of water. The reusable slippery water fracturing fluid for the shale oil and gas reservoir has the beneficial effects that (1) the resistance reducing agent can be dispersed and dissolved quickly to form a uniform system, so the problem of difficulty in large-scale intermediate liquid preparation in a shale fracturing process is solved; (2) the slippery water fracturing fluid can be reused, so the treatment cost of return liquid is reduced; (3) the resistance reducing ratio of the slippery water is more than 75 percent, so large-displacement construction is realized, the requirement on pump injecting equipment is reduced, and the frictional resistance of the slippery water in a pipeline in a large-displacement fracturing construction process can be effectively reduced; and (4) the slippery water fracturing fluid has a wide application range, strong temperature adaptability and temperature adaptability, and low requirement on water quality.

The invention relates to a seawater desalination device employing solar energy and vapor compressing distillation, belonging to the technical field of solar energy. The seawater desalination device comprises a solar collector, a first circulating pump, a heat exchanger, an evaporative condenser, a blower fan and a vacuum pump mechanism, wherein the solar collector is connected with the first circulating pump; the heat exchanger is respectively connected with the solar collector and the evaporative condenser; the evaporative condenser is connected with the blower fan; the vacuum pump mechanism is connected with the evaporative condenser; the evaporative condenser comprises an evaporation chamber and a condensation chamber; the condensation chamber is embedded into the evaporation chamber; the evaporation chamber is connected with the heat exchanger; and the position where the condensation chamber is embedded into the evaporation chamber is provided with a heat exchanging wall surface. The invention desalinates seawater in the mode of combining the solar energy and a low-pressure vapor compressing distillation seawater desalination method, reduces the pretreatment cost of seawater or brackish water, simplifies the mechanism and is also conveniently realized. The whole device is operated at the low pressure, reduces the operating temperature and improves the heat efficiency by employing the evaporative condenser to recover condensation heat.

The invention belongs to a producing and cooling technique of rolled steel, relating to a cooling method of a heavy and medium plate controlled rolling intermediate blank, which can be realized by both a single-stand heavy and medium plate roll and a double-stand heavy and medium plate roll. The cooling method comprises the following steps of: transmitting a roughly rolled intermediate blank with the thickness range of 30-110 mm in an austenite recrystallization zone into an intermediate controlled cooling zone from a transmission roller way for rapidly cooling to 800-950 DEG C, and then transmitting the intermediate blank into the roll for rolling in a non- recrystallization zone after short-time air cooling and temperature evening. In the intermediate cooling process, an upper collecting pipe and a lower collecting pipe with high density or ultra-high density are adopted to impact, jet and cool the intermediate blank, and specific technological parameters are accurately controlled by a computer. Water is cooling water for the roll with the pressure of 0.3-1.0 MPa in a common water circulating system for workshops. The intermediate cooling holding time is 30-70% shorter than that of the conventional process so that the production efficiency is improved, and due to austenite grain refinement after intermediate controlled cooling, the mechanical properties of a steel plate can be improved.

The invention provides slippery water for shale gas fracturing. The slippery water is prepared from the ingredients in percentage by weight: 0.08-0.3wt% of an emulsion friction reducer, 0.3-1.0wt% of a clay stabilizer, 0.3-1.0wt% of a discharge aiding agent, 0.5-2.0wt% of potassium chloride, 0.05-1.0wt% of a bactericide and the balance of water. Specifically, the emulsion friction reducer is an anionic polyacrylamide copolymer, is prepared through taking acrylamide as a main body structural unit, adding an ionic structural unit and a functional monomer and copolymerizing, and has the viscosity-averaged relative molecular mass of 6-9 millions and the intrinsic viscosity of 1,600-1,860mL / g. According to the slippery water provided by the invention, the used additives are high in dissolution rate and uniform in dispersion, and during field application, the on-line preparation of the slippery water can be realized by using continuous preparing or in an on-line preparing device, so that the technical requirements of a shale gas reservoir on high-displacement (10-20m<3> / min) and high-liquid-volume (10,000-50,000m<3>) fracturing construction are met.

The invention provides a device and method for cooling an intermediate rolled blank of a hot rolled strip. The device comprises an upper collecting pipe arranged above roller beds and a lower collecting pipe arranged between the roller beds, wherein the upper collecting pipe and the lower collecting pipe are both provided with nozzles and opening and closing control valves and are connected with a workshop circulating water system through collecting pipe water supply pipelines; and the collecting pipe water supply pipelines are provided with flow control valves. The opening and closing control valves and the flow control valves are controlled by a programmable controller. A plurality of groups of cooling collecting pipes which can be independently controlled to open and close and has smaller flow are arranged between every two roller beds, the intermediate blank is cooled by adopting water jet, and the cooling speed is correspondingly dynamically controlled according to the transmission speed of the intermediate blank. The invention has the advantages of relatively simple structure of the device, low requirement for water quality, good flow stability and high production efficiency, and is convenient to maintain and free of limit of speed raising of a roughing mill and deceleration of throwing steel; rolling mill cooling water is adopted and a single water supply and drainage system is not needed; and grains of the intermediate blank are remarkably refined, and the mechanical property of a steel plate is improved.

The invention discloses a liquid thickening agent system including an organic solvent, a plant gum thickener, an organic thickener, an emulsifier and water. According to the thickening agent system disclosed by the invention, the thickening agent system is easy to prepare and has a certain salt resistance; the thickening agent system is fast to swell when used for being mixed with water to prepare a fracturing fluid, the requirement on preparing water is low, and even if sea water (containing salt) is used, the swelling effect of the thickening agent is also not affected.

The invention discloses an Al alloy material which reacts with water at room temperature to prepare hydrogen, and a use method thereof; the Al content in the alloy material is 3 weight percent to 95 weight percent, and the rest are one type or more than one type among Sn, Zn, Bi, Pb, Mg, Ca and In elements; when Ca and In are contained, the content of Ca and In is not more than 10 weight percent; the alloy material is prepared by melting alloy and then mechanically processing alloy cast ingots into foil-like or sheet-like materials; the material is taken as the raw material for preparing hydrogen, improves the hydrogen preparation capability when the cost is quite low, can prepare hydrogen on a large scale, and is easy to be stored and transported.

The invention discloses a quenching and tempering device for cooling high-temperature fume, comprising a two-fluid electrical appliance controller, a water path and an air path arranged between a high-temperature fume inlet and a high-temperature fume outlet. The device of the invention is characterized in that a low pressure pump is arranged in the air path, a low pressure air path is combined into a water pipeline before a spray gun, two transducers are arranged to adjust the pressure and flow of a water pump and an air pump, the nozzle bore diameter is phi 6-7mm, and the spray particle diameter is smaller than 300 micrometers; a temperature sensor is respectively arranged at a wetting tower inlet and the fume outlet, and the outlet temperature is controller to 130-150 DEG C; an operation program is controlled to calculate the temperature difference of the fume inlet temperature and the fume outlet temperature, tower volume and spray fall height; two transducers are used for controlling the water pump and the air pump to automatically adjust operation power when low air pressure is 0.4-0.6MPa, and air flow quantity and water flow quantity are 5-25T / H. the particle diameter of sprayed water spray is small and even, which can better realize precise control to temperature and reduces atomization particle residence time and wet bottom danger. The dust removal device designed by the invention increases fume density and volume, lowers speed and improves dust removal function. In particular, the spray granularity is small, which can obviously control temperature and humidity, lower discharge Dioxin and furan mixed in dust and reduce environment protection cost.

The invention discloses an efficient salt-resistant dual-purpose thickening agent, a preparation method and application thereof. The preparation method of the thickening agent comprises the followingsteps of: S1, preparing a water phase; S2, preparing an oil phase; S3, performing emulsifying; S4, conducting polymerization; and S5, carrying out aftertreatment. A hydrophobic monomer, a functional monomer and a salt-resistant monomer are introduced into the thickening agent to form a compact and complex spatial network structure in an aqueous solution, so that the thermal stability and the saltresistance of the thickening agent are improved, and the aqueous solution of the thickening agent can keep relatively high viscosity under a hypersalinity condition. Due to the addition of a chain extender, the molecular chain of the polymer is longer, and the viscosity is greatly improved. A cosolvent is introduced, so that the dissolving speed of a polymer emulsion is further increased, the polymer emulsion can be completely dissolved in 30 seconds, the requirement on water quality is low, and the polymer emulsion can be prepared from oilfield reinjection water and oilfield wastewater. Due to the addition of a suspending agent, the emulsion system is more stable, and the emulsion is not layered within two years. The thickening agent also has the characteristic of dual purposes, and can be used as a fracturing fluid slickwater drag reducer and a fracturing fluid thickening agent.

A lithographic fountain solution composition containing complex surfactants is composed of the complex surfactants, buffering electrolytes, water-soluble high-molecular compounds, aqueous germicide and algicide, aqueous antifoaming agents and water. The complex surfactants include two or more nonionic surfactants, anionic surfactants, cationic surfactants or ampholytic surfactants. The lithographic fountain solution composition containing the complex surfactants has the advantages of excellent dynamic ink-water balance performance, low requirements on quality of water for working solution preparation, high adaptability to changes of temperature conditions and the like; using the lithographic fountain solution composition can evidently improve quality of prints, improve printing efficiency and reduce production cost; in addition, the lithographic fountain solution composition contains no poisonous and harmful substances and is high in stability and long in storage time.

The invention relates to color fixing substitution alkali for low-salt dyeing by using a reactive dye pad steaming process, and the color fixing substitution alkali can be applied to low-salt color-fixing treatment on a cotton fabric dyed with a reactive dye. The color fixing substitution alkali is an organic / inorganic composite buffer system consisting of alkali metal hydroxide, alkali carbonate, a dispersing agent, an alkali-resistant penetrating agent and an accelerating agent. The traditional color-fixing alkali agent for the reactive dye is replaced and low-salt dyeing is realized under the condition of not changing the traditional technological equipment and flow. The color-fixing substitution alkali agent has the characteristics of low consumption, favorable stability, convenience for operation, and the like, meanwhile, is beneficial to reduction of production cost and environment pollution, has little influence on the equipment and meets the requirements on energy saving, emission reduction and efficiency increase.

The present invention relates to an ozone heterogeneous catalytic oxidation moving bed reactor and a refractory wastewater treating method therefor. The reactor consists of a water inlet system, an ozone generating system, a catalytic oxidation reaction system, a gas recovery system, a catalyst washing system and a water outlet system. The catalytic oxidation reaction system comprises a reactor and a catalyst. The catalyst washing system comprises a stripper, a feed pipe, a blanking outlet, a washing wastewater discharging pipe and a catalyst cleaning chamber. The water inlet system consists of a water inlet pipe and a water distributor. The water outlet system consists of a water outlet slot and a water outlet pipe. The gas recovery system consists of a three-phase separator, a gas collection chamber, a gas collecting pipe and a gas breaker. In comparison with the prior art, the moving bed reactor provided by the present invention is less in occupied area, low in investment and operating cost, good in treatment effect, and convenient in operational management, and is capable of greatly improving the biodegradability of refractory wastewater, providing a good water condition for the follow-up biological treatment and in addition removing 40% of organic substances.

The invention provides a humidifying cabinet air conditioner which comprises a cabinet main body, wherein the cabinet main body is provided with an air conditioner control panel, an air outlet at the upper part of the cabinet main body is provided with an air deflector, in addition, the top of the cabinet main body is fixedly provided with a first water storage tank for storing humidifying liquid and a second water storage tank for storing a liquid air freshener, each of the first and second water storage tanks is provided with a water injection port, a water outlet, a liquid level sensor and a water outlet pipe, the water drainage of each water outlet pipe is controlled by an electrovalve, and a hydrophilic material layer is paved on the surface of the air deflector and is respectively communicated with the water outlet pipes by capillary drainage pipes. The electrovalves are controlled by the air conditioner control panel, so that the humidifying liquid or the liquid air freshener in the first water storage tank or second water storage tank wets the hydrophilic material layer on the air deflector, and the air humidifying and freshening effects are realized in an air supply process at an air outlet; the humidifying cabinet air conditioner has the advantages of simple structure, convenience in use, energy conservation, longer service life and the like.

The invention provides a high-and-low-temperature supercritical carbon dioxide waste heat utilization system which comprises a high-temperature turbine, a low-temperature turbine, a waste heat recoverer, a high-temperature reheater, a low-temperature reheater, a condenser and a gas compressor. A gas inlet of the high-temperature turbine is sequentially connected with the waste heat recoverer, the high-temperature reheater, the gas compressor and the condenser. A gas inlet of the condenser is further sequentially connected with a gas outlet of the high-temperature reheater and a gas outlet of the high-temperature turbine, so that a high-temperature turbine circulation loop is formed. A gas inlet of the low-temperature turbine is sequentially connected with the waste heat recoverer, the low-temperature reheater, the gas compressor and the condenser. A gas inlet of the condenser is further sequentially connected with a gas outlet of the low-temperature reheater and a gas outlet of the low-temperature turbine, so that a low-temperature turbine circulation loop is formed. According to the high-and-low-temperature supercritical carbon dioxide waste heat utilization system, exhausted high-temperature gas of a gas turbine or industrial waste heat / lost heat serves as a heat source, high-grade heat energy is utilized efficiently, and low-grade heat energy is utilized, so that energy sources are utilized sufficiently, and the overall circulation efficiency is improved.

The present invention relates to reinforced oxidizing process of treating waste water containing toxic organic matter. By means of the excitation of externally applied energy, catalyst, oxidant and oxygen generate synergistic effect to produce strongly oxidizing ozone and free hydroxyl group degrading toxic organic matter, the catalyst being in fluidized or semi-fluidized state during the reaction. The present invention also provides the technological apparatus, which consists of one energy generator, one reactor, one tail gas collector, one water distributor and one water inflow pump. The present invention has short treating period, high treating efficiency and great treating capacity.

The invention discloses novel aluminum and a high-molecular aluminum alloy chromium-free film forming agent. 1L of the high-molecular aluminum alloy chromium-free film forming agent is characterized by comprising the following components by weight: 20g to 100g of modified water-based high-molecular resin, 3g to 20g of an oxidant, 5g to 40g of a film forming aid, 0.5g to 5g of a wetting agent, 1g to 10g of a complexing agent and the balance of water. The novel aluminum and the high-molecular aluminum alloy chromium-free film forming agent disclosed by the invention are nontoxic, need no complex preparation process and have the advantages of greatly improving the production efficiency, being short in treatment time, realizing an excellent film formation effect at room temperature, greatly improving the corrosion resistance of the material, causing no precipitate slags, saving energy and protecting environment.

The invention relates to an ultrasonic atomization fire extinguisher, which comprises a power supply unit, a water level adjusting unit and an ultrasonic atomization unit, which is characterized in that a circulating fan that is arranged in an atomization cavity and forms internal circulating airflow of the atomization cavity and an overflow port of gas phase and water phase is a water mist outlet of the atomization cavity. A ventilation unit of the invention realizes the circulation flow of air in an atomizer, thus preventing outside air from diluting the water mist, greatly prompting the dripping mass fraction of the water mist and causing ultrasonic atomization to be applied in fire fighting.

The invention discloses a purification method for oilfield reinjection water. According to the method, at least one level of membrane filtration treatment is carried out on oilfield produced water through a cellular carrier type inorganic carbon membrane component so as to prepare the reinjection water suitable for low permeability and extra-low permeability oil reservoirs, wherein the filter precision of the membrane component for membrane filtration treatment is 0.001-100mu m. The purification method has high filtration accuracy, the membrane flux of the compound carbon membrane carrier is large, the capacity of the membrane in resisting oil contamination is strong, the integration level of the structure of the membrane core is high, the quality of the prepared reinjection water is stable, and fine filtrated oilfield reinjection water meets the requirement of the reinjection water for the oil reservoirs in low permeability and extra-low permeability block, and meets the A-grade standard of 'recommended index and analysis method for quality of oil reservoir injection water of clastic rock' (SY / T 5329-94).

The invention discloses an anti-clogging capillary drip irrigation emitter with a flat plate superimposition structure. On basis of a physical phenomenon that water in a narrow slit rises up under the action of capillary force, at least two n-shaped flat plates are used to form a stable narrow slit to enable water in a container to move upwards and diffuse outside the container along the narrow slit, and then the balance between gravity of water and surface tension of the narrow slit to water is broken, as a result, the required drip irrigation speed is obtained, water is enabled to move from the inside of the container to the outside of the container at a low speed, and water-saving irrigation is performed on a targeted plant. The capillary force only works on water and has no effect on solids such as sandy soil, and meanwhile, the uninterrupted drip irrigation scheme is adopted, so that salt substances are diluted continuously to prevent salt accumulation; and further, a micro water delivery device is placed in a working environment insolated from sunlight, so that microbes are prevented from breeding. In this way, the capillary drip irrigation emitter can be prevented from being clogged by sandy soil, salt and microbes, and meanwhile, a super-large size drip irrigation system free from limitation of pressure attenuation can be constructed by utilizing the theory of communicating vessels.

The invention discloses a gel fracturing fluid prepared from oilfield sewage and a preparation method thereof. The gel fracturing fluid comprises the following components in percentage by weight: 0.01-1% of water quality regulator, 0.01-0.5% of bactericide, 0.1-0.8% of thickener, 0.1-0.5% of crosslinking agent, 0.01-0.5% of viscosity breaker and the balance of oilfield sewage. The gel fracturing fluid prepared from oilfield sewage has favorable temperature resistance and shear resistance, and satisfies the demands for on-site construction. The gel fracturing fluid prepared from oilfield sewage relieves the demands of hydraulic fracturing for water resources, and solves the problem of treatment of oilfield sewage. The gel fracturing fluid prepared from oilfield sewage has the advantages of favorable clay swelling resistance and low formation damage rate, thereby reducing the use of the antiswelling agent and saving the cost. The gel fracturing fluid prepared from oilfield sewage has wide formation application range, avoids damage to the formations which are sensitive to alkali, acid and the like, has favorable economic benefit and environmental benefit, and is suitable for popularization and application.

An off-line reverse flushing system for reverse osmosis membrane module is composed of the water tank unit consisting of forward flushing water tank and reverse flushing water tank, the membrane container, and the water pump unit consisting of forward flush water pump and reverse flushing water pump. They are communicated with each other via valves and pipelines.

The invention relates to a zero-discharge system and technology of desulphurization waste water based on an ion selective electrodialysis technology. According to the system, a softening pretreatment mechanism comprises a reaction groove, a clarifier and a filter device, and a reduction concentration mechanism is an ED ion membrane device. Fresh water precipitated by the ED ion membrane device is reused as make-up water for a desulfurization system, or is reused through the concentration of a reverse osmosis membrane, reverse osmosis membrane concentrated water returns to the process before softening pretreatment, and circulation treatment is conducted. According to the zero-discharge system and technology, through the treatment of a three-linkage-box technology, lime is adopted and the pH of the lime is adjusted to 9-9.5, no alkali needs to be added to adjust the pH to 11 or above, the addition amount of the lime is small, few calcium ions are carried in, the calcium ions can generate precipitated sodium carbonate or sodium sulfate without adding more calcium ions, and after clarification and precipitation, filtered water directly enters the ED ion membrane device to be reduced and concentrated. Compared with the prior art, the technology processes are short, the operation and investment cost is low, the system is convenient to maintain, the ion selective electrodialysis technology is adopted, and the system has the advantages of being long in service life, low in requirement for water quality, high in concentration multiple, low in operation load and little in energy consumption.

The invention relates to a plate type evaporation air-cooling condenser, in particular to a plate type evaporation air-cooling condenser with obliquely-arranged heat exchange plate bundles. The condenser comprises spraying devices, the heat exchange plate bundles, a box, a fan, an air exhaust barrel and a circulating water pump, wherein the air exhaust barrel is arranged on the top of the box; two groups of heat exchange plate bundles are arranged downwards on the box on the two sides of the air exhaust barrel respectively; an angle of between 110 and 130 DEG is formed between the two groups of heat exchange plate bundles; the upper end and the lower end of each group of heat exchange plate bundles are provided with an upper connecting box and a lower connecting box respectively; the upper connecting boxes and the lower connecting boxes are used as steam inlets and condensed water outlets respectively; the upper sides of the two groups of heat exchange plate bundles are provided with a group of spraying devices respectively; the lower ends of the lower connecting boxes are connected with the box; the fan is arranged in the air exhaust barrel; and the upper end of the circulating water pump is connected with the spraying devices, and the lower end of the circulating water pump is extended to the bottom of the box. The condenser has the advantages of high heat transmission efficiency, energy conservation, small occupied area and the like; and the heat exchange plate bundles are obliquely arranged, so that condensed water is convenient to discharge, thermal resistance is reduced, heat transmission is enhanced, a counter current area is convenient to form, and non-condensed gas is discharged.

The invention relates to a ship ballast water treatment device which comprises a suction pipeline, a ballast water pump, a filtering device and a drainage pipeline, wherein the suction pipeline is communicated with seawater and is sequentially connected with the filtering device and the drainage pipeline; the discharge pipeline is connected with a ship ballast water tank. The ship ballast water treatment device further comprises a dielectric barrier discharge reaction device and a high-voltage and high-frequency power supply, wherein the dielectric barrier discharge reaction device is arranged between the filtering device and the drainage pipeline; the high-voltage and high-frequency power supply is connected with the dielectric barrier discharge reaction device and supplies power to the dielectric barrier discharge reaction device. The ship ballast water treatment device has the advantages that the structure is simple, and the cost is low; the dielectric barrier discharge reaction device can be directly arranged in an existing ship ballast water treatment system to realize transformation; the device for treating ballast water through dielectric barrier discharge reaction has the remarkable advantages of good treatment effect, low requirements on water quality, high treatment speed, no secondary pollution and the like.

The invention discloses a water-cooling resistor for separation of water and electricity. The water-cooling resistor comprises a plastic case, wherein one side of the plastic case is connected with one side of an insulating plate, a plastic plate is arranged in the plastic case, and a copper bar terminal is arranged on the plastic plate. The water-cooling resistor is characterized in that the other side of the insulating plate is connected with a water cooling box, the copper bar terminal is connected with a resistor piece in the water cooling box, an insulator is arranged between the resistor piece and the water cooling box, and the water cooling box is provided with a water inlet and a water outlet. The water-cooling resistor has the characteristics of small volume, high dielectric strength, strong antiknock performance, low requirement on water quality, and the like.

The invention provides a closed type compressed air and low-pressure water premixing self-rotating water mist fire extinguishing device. The fire extinguishing device comprises an air and water mixing fixed pipe, a compressed air pipeline, a water supply pipeline, air and water automatic control valves, a compressed air and water premixer, an automatic rotating shell, a rotating sealing component, a plurality of L-shaped bent spray rods and a plurality of open type compressed air and water nozzles, wherein the air and water automatic control valves are arranged on the compressed air pipeline and the water supply pipeline and are connected with an air inlet pipe and a water inlet pipe of the compressed air and water premixer, and trial air release valves and closed type nozzles are arranged on the air and water automatic control valves; the outlet end of the compressed air and water premixer is connected with the automatic rotating shell through the air and water mixing fixed pipe; the plurality of L-shaped bent spray rods are arranged on the automatic rotating shell; and the compressed air and water nozzles are arranged at the bottom end of the automatic rotating shell and the L-shaped bent spray rods. The requirement on a system is lowered. Normal fire extinguishing water, namely low-pressure water, is supplied by a water supply system, but the hole diameter of the compressed air and water nozzles is increased, so that the compressed air and water nozzles cannot be easily blocked, and the requirement on water quality is lowered. Compared with the existing high-pressure water mists, water mists produced by the device have the advantages that the sizes of the water mists are smaller and more uniform, the effective acting range is larger, and the fire extinguishing effect is better.

The invention discloses a purifying method of condensed water. The purifying method comprises the steps of adopting a honeycomb-shaped carrier type inorganic carbon membrane assembly to carry out at least one stage of membrane filtering treatment on high-temperature condensed water, wherein the filtering accuracy of the membrane assembly treated by membrane filtering is 0.001-100mum, and preparing the boiler supplementing water suitable for recycling. The purifying method disclosed by the invention has the advantages that the filtering accuracy is high, the membrane flux of a honeycomb-shaped carrier type membrane core is large, the impact resistance of incoming water is strong, the resistance to oil pollution is strong, the integration level of the membrane core structure is high, the preparation method is simple, a complex online discrimination system is not needed, and the prepared condensed water is stable in quality and high in temperature, meets the requirement on water quality of the boiler supplementing water and saves a great amount of heat.

The invention provides a novel brown algae chemical waste calcium water recycling process. The process comprises the steps that: a decalcification agent is added into waste calcium water, such that a decalcification treatment is carried out; a sand filtration pre-treatment is carried out; salt removing and calcium removing are carried out by electrodialysis; residual calcium ions in low-concentration water obtained after electrodialysis are further removed by using cation exchange resin; water obtained from the treatments is mixed with tap water according to a certain ratio, and the mixed water is reutilized as a process water for diluting a digestion solution; and the diluted solution is filtered and calcified, and the produced waste calcium water enters a new circulation. According to the invention, a chemical precipitation, electrodialysis and ion exchange combined process is adopted, such that defects such as poor water quality and high cost of traditional waste calcium water treatment processes are overcome. A recycling water quality index is ensured, and waste calcium water treatment cost is reduced, such that economic and high-efficiency recycling is realized.

The invention discloses a field biogas slurry fertilization integrated irrigating system, which comprises: a biogas slurry feeding pipe, a biogas slurry tank, a filter screen, a sewage pump, a biogas slurry discharging pipe, a three-way tube, a water inlet pipe and a water outlet pipe. The biogas slurry feeding pipe is communicated with the biogas slurry tank. The filter screen and the sewage pump are arranged in the biogas slurry tank. One end of the biogas slurry discharging pipe is communicated with the sewage pump and the other end of the biogas slurry discharging pipe is communicated with the three-way tube. Both the water inlet pipe and the water outlet pipe are communicated with the three-way tube. The system is energy-saving and environmental-protective, is less in investment, is low in water quality requirement, is suitable for agriculture irrigating devices in various water sources, various crops and various land scales, and has a wide application prospect.