66results about How to "Solve the escape" patented technology

The invention provides a lithium sulfur battery taking a transition metal material as a current collector, which comprises a positive electrode, a negative electrode, an electrolyte, a diaphragm and a battery case, wherein the positive electrode is composed of the transition metal material current collector, a sulfur-based composite applied onto the current collector, a conductive agent and a bonding agent. The transition metal current collector adopted in the battery can be corroded by the electrolyte or oxidized during the charging / discharging process, so as to release transition metal ions, which can rapidly react with an intermediate product Sn2- of the lithium sulfur battery to generate a transition metal sulfide precipitate and further prevent the Sn2- from escaping. Meanwhile, the transition metal sulfide has outstanding electrochemical activity, can improve utilization rate of active sulfur, and further improves reversible capacity. Therefore, due to use of the transition metal current collector, the performance of the lithium sulfur battery is significantly improved.

The invention discloses a flue gas desulfurization tower, which comprises a tower body; a circulating slurry pool, a sprinkler, a mechanical demister, and a wet type electric dust collector. A flue gas inlet is arranged on the tower body below the sprinkler, and a flue gas outlet is arranged at the top end of the tower body. The tower provided by the invention adopts combined wet type electric dust collection and wet desulfurization, employs limestone / lime or other alkaline materials (including ammonia water) as desulfurizer, can effectively solve the problem of NH3 escape existing in the ammonia desulfurization process, reduces secondary pollution, recovers absorbent, reduces ammonia consumption, can not only reduce stages of demisters in the device, but also remove liquid droplets of different particle sizes, PM2.5 fine dust and heavy metal mercury from flue gas, and captures various gases, such as SO3 and NH3, and existing in the form of aerosol in the flue gas.

The invention discloses a device and method for denitrifying flue gas of a coking furnace by using citric acid as a catalyst. The device comprises a cooling device, a desulfurization device and a denitration device. The method for denitrifying flue gas of the coking furnace by using the device comprises the following steps of cooling the flue gas of the coking furnace three times; desulfurizing the flue gas of the coking furnace; carrying out first-stage denitration on the flue gas of the coking furnace; carrying out second-stage denitration on the flue gas of the coking furnace; and discharging the purified flue gas. The method disclosed by the invention is safe, reliable, high in denitration and absorption efficiencies, little in influences to the suction force of a chimney, free of waste liquid discharge and capable of reducing the operation cost at the desulfurization stage; the obtained product does not contain poisonous ammonium sulphate; and the contents of SO2, NO and NO2 in the discharged flue gas are far lower than the national flue gas discharge standard.

The invention discloses a predatory mite toxicity testing method which comprises the following steps: (1) keeping predatory mites at minus 20 DEG C for 5min so that the predatory mites are under a cold paralytic state, picking the predatory mites on a nylon screen above 300 meshes through a fine writing brush, fully soaking the nylon screen attached with the predatory mites in an agent to be tested and keeping for 5-10s; and then, lifting the nylon screen, placing on a piece of dry filter paper and absorbing residual solution; (2) opening an upper cover of a predatory mite toxicity testing device, putting the nylon screen with the predatory mites in the step 1 onto a mite supporting screen in the predatory mite toxicity testing device, covering the testing device, placing the device on a tray that contains water, breeding the tray in an artificial incubator, observing and recording death rate of the predatory mites after a period and calculating a toxicity testing result. The predatory mite toxicity testing method disclosed by the invention is simple and convenient to operate and is accurate and reliable in result.

The invention discloses a system for desulphurization and denitration. The system comprises a tower body. A lower part of the tower body is provided with a flue gas inlet. The interior of the tower body corresponding to a position below the flue gas inlet is provided with an oxidization section. The interior of the tower body corresponding to a position above the flue gas inlet is orderly provided with a concentration section, an absorption section, a purification washing section and a demisting section from bottom to top. The invention also discloses a method for desulphurization and denitration by the system. The system for desulphurization and denitration has an ingenious and reasonable design, effectively solves the problem of a high operation cost, has stable processes, realizes absorption and concentration crystallization combination, does not produce waste liquid, limits ammonia escape and discharge and thoroughly solves the problems of ammonia escape and aerosol. The method for desulphurization and denitration has simple processes, realizes desulphurization and denitration, has high desulphurization and denitration efficiency, saves energy, is environmentally friendly, has a low cost, can be operated safely and stably, changes wastes into valuables, and indicates a key direction for environmentally-friendly desulphurization development.

The invention discloses a multi-section ammonia-process desulfurization and dust removal absorption tower for flue gas of a carbon furnace and a coke oven. A flue gas desulfurization and dust removal process adopts a counter-flow jetting and filling type absorption tower design; a flue gas inlet is formed in the lower middle part of the absorption tower; a water spraying and cooling device is arranged at an inlet flue; a flue gas outlet is formed in the top of the absorption tower; the absorption tower is internally provided with a screen mesh de-foaming section, an aerosol washing section, a demisting section, an absorption section and a flue gas uniform distribution and dust removal section in sequence from top to bottom; an oxidization pond at the bottom of the tower is internally provided with an oxidized air distribution discharging pipe and a pump stirring device; a compressed air inlet, an ammonia water inlet and an absorption circulating pump inlet are formed in the outer side of the tower; an ammonium sulfate paste discharging pump inlet is formed in the bottom of the tower. The multi-section ammonia-process desulfurization and dust removal absorption tower for the heating flue gas of a calcining furnace of a carbon factory and the coke oven of a coking factory can efficiently finish a flue gas desulfurization and dust removal process in an energy-saving manner, and has relatively great industrialization prospect.

The invention discloses a method for breeding aphidius gifuensis within a short cycle. The method comprises the steps of: host plant cultivation, pest species breeding, and aphidius gifuensis large-scale breeding. A breeding cycle of the whole process is 29-40 days. Each dish of brassica chinensis can breed more than 12000 of aphidius gifuensis, a parasitism rate of the aphidius gifuensis is 95%, a formation rate of stiff aphids is 60%, and stiff aphids of the aphidius gifuensis in each dish can be used for controlling 10-15 mu of aphid-damaged farmland. Brassica chinensis of a vegetable variety is adopted as a host plant with high strong adaptability and fast growth; and the brassica chinensis a host plant variety with a shortest cultivation cycle in current breeding technology of sphidius gifuensis, thereby reducing a breeding cycle of the aphidius gifuensis, and improving breeding efficiency of the aphidius gifuensis. The method adopts a flotation breeding method for cultivating the host plant, is simple in process step and solves the problems such as high breeding energy consumption, a tedious technical process, poor activity of the aphidius gifuensis, and irregular formation of the stiff aphids of the aphidius gifuensis, and can increases a utilization rate of the aphidius gifuensis for wide application in agriculture and forestry industry, thereby enabling the aphidius gifuensis to have better feasibility of production, promotion, and application.

The invention relates to a multifunctional nanometer cage bioreactor with high stability and recoverability and a preparation method for biomaterial solid borne. The method comprises the following steps: using silicon as a raw material, a surface active agent as a template agent, trialkoxysilane with a functional group which can be loaded to the material surface as a material group reagent, and a mesoporous material synthesizing surface group as a cage body; filling a biological material as a catalytic center in the cage by an adsorption mode; using the reagent with two or more than two reactive groups as the cross-linking agent to connect an aperture modifying materials with bioactivity; and closing the catalytic center in the cage to prevent the catalytic center from escaping from a vector material and to execute a plurality of other biological functions. The multifunctional nanometer cage bioreactor synthesized according to the method is characterized by having a structure which uses a shell as the mesoporous material to fixedly load two or more than two biological materials in different types in sequence according to a selective regulation, and having the advantages of multiple functions, high stability, reutilization and the like.

The invention provides an ultra-low-concentration gas combustion method and system which belongs to the field of recycle of ultra-low-concentration gas and can solve the problems of gas escape generated in the processing process of ventilation air methane and low heating efficiency in the prior art. The ultra-low-concentration gas combustion method comprises the following steps: a, supplying ultra-low-concentration gas and mixed ventilation air methane at initial temperature to a direct combustor, and gradually lighting the mixed ventilation air methane with a heat source medium in the direct combustor until all are lighted; b, sending the lighted mixed ventilation air methane into a reaction chamber for sufficient combustion, and therefore generating high temperature flue gas; c, gradually recycling the heat of the high temperature flue gas until the temperature of the flue gas lowers to the target temperature. The ultra-low-concentration gas combustion method and the system can be used for processing ultra-low-concentration gas.

The invention discloses a preparation method of a composite filtering material fiber used for SCR dust removal and denitration. The preparation method includes the steps of: 1) dissolving manganese salt, cerium salt and zirconium salt in water to prepare a salt solution A; 2) preparing an alkaline solution B being 8-12 in pH value; 3) soaking fibers in the salt solution A for infiltration, during infiltration, performing ultrasonic wave treatment for assistance for a certain time, and draining the infiltrated fibers and soaking the fibers in the alkaline solution B for impregnation and precipitation for 15-70 min; 3) taking the impregnated and precipitated fibers out and aging the fibers, performing microwave thermal treatment to the aged fibers, and finally activating the aged fibers to prepare the composite filtering material fiber. The composite filtering material fiber can enable oxides of Mn, Ce and Zr to be firmly bonded to the fibers, and enables active metal oxides to be dispersed more uniformly in the fibers. A bifunctional composite filtering material woven by the fibers can not only capture granules but also remove NOx in coal-fired flue gas.

The invention provides a chlorosilane-containing waste gas washing treatment method and device in a polycrystalline silicon production process. The device comprises a waste gas buffer tank, a chlorosilane-containing waste gas supply pipeline connected with an inlet of the waste gas buffer tank, and a normal waste gas spraying system, an accidental waste system spraying system and an emergency washing system which are connected with an outlet of the waste gas buffer tank. The chlorosilane-containing waste gas is fed into a spray tower and is washed by spraying 10-30 percent of sodium hydroxide. The gas generated after spraying is discharged into atmosphere through a water-sealed tank. According to the method, the problem that hydrogen chloride escapes is effectively solved, the problem that the pipeline is blocked by silicon dioxide generated in the traditional washing process is solved, and harmlessness of environmental protection is realized. According to the device, the chlorosilane waste gas can be effectively and harmlessly treated, escape of hydrogen chloride can be effectively reduced, and sodium silicate generated in the reaction is relatively convenient to remove.

The invention discloses a cleaning sieve. The cleaning sieve comprises a machine frame, a feeding system, a vibrating screen and a wind-selection dust-removing system, wherein the feeding system, the vibrating screen and the wind-selection dust-removing system are arranged on the machine frame and are sequentially connected; the wind-selection dust-removing system comprises a wind-selection device, a primary dust-removing unit, a secondary dust-removing unit, a dust collecting device and a pressure-reduction dust-sucking pipe; the wind-selection device is provided with an inlet and a dust outlet; the inlet of the wind-selection device is connected to a discharging outlet of the vibrating screen; the dust outlet is connected to an air inlet of the primary dust-removing unit; the dust collecting device comprises a dreg inlet and a dreg outlet; a dust-discharging opening of the primary dust-removing unit and a dust-discharging opening of the secondary dust-removing unit are connected to the dreg inlet of the dust collecting device; one end of the pressure-reduction dust-sucking pipe is connected to an air inlet of the secondary dust-removing unit; the other end of the pressure-reduction dust-sucking pipe is connected to the place close to the dreg outlet of the dust collecting device.

The invention discloses a desulfurization and denitrification method. A system adopted in the method comprises a tower, wherein a flue gas inlet is arranged at the lower part of the tower, an oxidation section corresponding to the lower position of the flue gas inlet is arranged in the tower, and a concentration section, an absorption section, a purification and washing section and a demisting section corresponding to the upper position of the flue gas inlet are sequentially arranged in the tower. The invention further discloses the desulfurization and denitrification method of the desulfurization and denitrification system. The desulfurization and denitrification system is ingenious and reasonable in structural design, the problem of the high operation cost is effectively solved, the technology is stable, absorption and concentration crystallization are operated as a whole, no waste liquor is emitted, ammonia escape emission is limited, and the problems of ammonia escape and aerosol are thoroughly solved. The desulfurization and denitrification method has simple technological steps, realizes desulfurization and denitrification effects, has the characteristics of high desulfurization and denitrification efficiency, energy saving, environment friendliness, low cost and operation safety and stability, can turn waste into wealth and is a key direction of environment-friendly desulfurization development in future.

The invention discloses a production method of spice and in particular relates to a dihydromyrcenol fixed bed hydration continuous production method. The method comprises the following steps of: allowing dihydromyrcene, water or aqueous solution of a solvent to enter a feeding preheater respectively through a head tank and a flowmeter to perform preheating; allowing the reaction materials to enter a tubular reactor continuously and then overflow into an oil water separator to be separated; and allowing the lower layer aqueous phase to enter a reaction system continuously and circularly and allowing the oil layer to enter a rectifying tower to perform rectification, wherein the tower is provided with three discharge ports; and materials of different concentrations are discharged from the discharge ports respectively. The method has the advantages of really realizing zero emission of waste water, making the using ratio of pure water close to 100 percent, saving cost of raw materials, exchanging catalysts conveniently and simply, greatly prolonging the service life of the catalysts, solving the problem of escape of the catalysts, expanding easily, fulfilling the aim of zero use of the solvent and saving solvent cost, along with low equipment investment and wide application.

The invention discloses a method for preparing a low-temperature expandable graphite / polymer foam material. The preparation method is as follows: after the polymer and the low-temperature expandable graphite are fully dried, they are mixed according to a certain ratio to obtain an expandable polymer; Bubbles can generate foamable polymers; the present invention uses low-temperature expandable graphite as a foaming agent; the cost is low, and after being prepared into foamable polymers, it can be placed for a long time before foaming operations and still have expandable properties. bubble performance.

The invention relates to the technical field of inspection and quarantine, and particularly discloses a screen underflow split-charging device for inspection and quarantine of imported bulk agricultural products. The device comprises a barrel body and a barrel cover hoop; the barrel cover hoop is movably buckled at the top end of the barrel body; the barrel body comprises two arc bodies in mirrorsymmetry; the two arc bodies are connected to form a hollow circular-truncated-cone-shaped structure with upper and lower openings; one side of one arc body and one side of the other arc body are movably connected through hinges, and the other opposite side of one arc body and the other opposite side of the other arc body are in buckled connection through buckles; scale lines are arranged at the upper end of the outer side of the barrel body; the barrel cover hoop adopts the ring structure; an annular groove is formed in the ring structure and is matched with the upper edge of the barrel body;the barrel cover hoop can be movably buckled at the top end of the barrel body by the aid of the annular groove; and a plurality of brake wheels are mounted at the bottom of the barrel body. By the aid of the device, the problems that the labor is consumed, dust is scattered in all directions easily, screen underflow is prone to scattering and leakage all around, and scattering and escaping of pests are caused easily during split-charging of the screen underflow of the agricultural products are solved.

The invention belongs to the technical field of environmental protection of industries like electric power, metallurgy and chemical industry, and particularly relates to an ammonia desulphurization ultra-clean emission device. The ammonia desulphurization ultra-clean emission device comprises a sectional type desulfurizing tower and a wet type electrostatic precipitator, the sectional type desulfurizing tower comprises a tower body, the tower body is provided with a flue gas inlet, a flue gas outlet is arranged at the top part of the tower body, and the device further comprises a concentrationcycling tank and an ammonium hydroxide storage tank; a slurry pond, a concentration section, an absorption section and a demisting section are sequentially arranged in the tower body from bottom to top; the flue gas inlet is located on the concentration section, the flue gas outlet is communicated with the wet type electrostatic precipitator; the ammonium hydroxide storage tank is communicated with the slurry pond; an inlet of the concentration cycling tank is communicated with the slurry pond and the concentration section at the same time, and an outlet of the concentration cycling tank is communicated with the concentration section. The invention further provides an ammonia desulphurization ultra-clean emission process. The ammonia desulphurization ultra-clean emission device and the ammonia desulphurization ultra-clean emission process are quite high in desulfuration efficiency and dust collection efficiency, the ultra-clean emission requirement of the ammonia desulphurization technology is reached, the system is simple, and the cost is low.

The invention discloses a low-temperature CO-SCR denitration Cu-Ni / AC catalyst which comprises a carrier and active components, the carrier is coconut shell activated carbon (AC), and the active components are copper and nickel oxides. The mass ratio of the copper element to the nickel element to the AC in the low-temperature CO-SCR denitration Cu-Ni / AC catalyst is (0.02-0.1): (0.01-0.05): 1. Theinvention also discloses a preparation method of the catalyst. The preparation method comprises the following steps of: respectively dissolving copper nitrate and a nickel acetate reagent with deionized water to obtain a mixed precursor solution, impregnating the coconut shell activated carbon in a formula ratio, and carrying out loading and drying to obtain a primary product; and roasting the dried primary product for 4 hours under the protection of nitrogen at 450 DEG C to obtain the low-temperature CO-SCR denitration Cu-Ni / AC catalyst. The low-temperature CO-SCR denitration Cu-Ni / AC catalyst disclosed by the invention has the characteristics of high denitration activity, good nitrogen selectivity and wide denitration temperature range. The Cu-Ni / AC catalyst provided by the invention hasthe advantages of simplified preparation process, low energy consumption, good dispersity of active components, environment-friendliness and no pollution.

The invention discloses a method for removing escaping ammonia in an SNCR denitration system. The ammonia oxidative degradation system comprises an SNCR denitration system which consists of a deamination reaction zone, a coal economizer, an air preheater, a desulfurizing tower and a chimney, and further comprises a pneumatic mixing device or a pneumatic conveying device and an ammonia conversion catalyst supply device, wherein the pneumatic mixing device is respectively connected with the ammonia conversion catalyst supply device and a gas outlet flue of the deamination reaction zone; and theammonia conversion catalyst supply device is connected with gas outlet flues of the boiler economizer and the dust remover through the pneumatic conveying device. The method comprises the following steps: pneumatically mixing flue gas generated in a denitration reaction zone of the SNCR denitration system with an ammonia conversion catalyst at 300-700 DEG C, and carrying out catalytic oxidation reaction on ammonia to obtain ammonia-removed flue gas. According to the system and the method, escape of ammonia in the flue gas can be eliminated, the NO concentration in the flue gas can be further reduced, secondary pollution to the environment is avoided, and the system and the method are important supplements for a traditional SNCR process, are low in equipment investment and have important application values.

The invention belongs to the field of agriculture, and provides a feeding box which is a device for feeding mites and small insects. A circular feeding table is protruded at the bottom of the cylindrical feeding box, and an annular water tank is formed between the feeding table and the outer wall of the feeding box. The feeding box has the advantages that a hollow central platform is made of plastic materials and is used for feeding the small insects and the mites; the water tank is manufactured on the periphery of the feeding table and is used for storing water, the small insects or the mites which are arranged on the feeding table cannot climb out of the feeding device, and accordingly the problem of escape of existing fed mites can be solved; a method for feeding the insects or the mites is easy and convenient to operate, the insects and the mites are easy to observe, and the feeding box is particularly applicable to individually feeding, observing and recording the mites and the small insects.

The invention discloses a desulfurization and denitrification method of a desulfurization and denitrification system. The system comprises a tower body, wherein a flue gas inlet is formed in the lower part of the tower body; an oxidizing section is arranged at a lower position, corresponding to the flue gas inlet, in the tower body; a concentrating section, an absorbing section, a purifying and water washing section and a defogging section are sequentially arranged from bottom to top at an upper position, corresponding to the flue gas inlet, in the tower body. The invention also discloses a desulfurization and denitrification method of the desulfurization and denitrification system. The desulfurization and denitrification system provided by the invention is ingenious and reasonable in structural design, effectively solves the problem of high operation cost, and is stable in process; absorption, concentration and crystallization are carried out integrally, no any waste liquid is discharged, ammonia fugitive emission is limited, and the problems of ammonia escape and aerosol are thoroughly solved. The desulfurization and denitrification method provided by the invention is simple and easy in process steps, not only realizes the effects of desulfurization and denitrification, but also has the characteristics of high desulfurization and denitrification efficiency, energy conservation and environment protection, low cost and stable operation safety, and can make waste profitable.

The invention relates to an intracranial vascular pincers type thrombus take-out device in the field of medical apparatuses. When a vascular thrombus take-out support is bent, the side face of the near end of the vascular thrombus take-out support is bent to form a first large mesh hole; a second large mesh hole is formed in a unit mesh opposite to the first large mesh hole, and the area of the second large mesh hole is larger than the area of the unit mesh; the vascular thrombus take-out support is matched and provided with a plurality of developing marks. A conveying system comprises a conveying guide wire, a protection sheath, a miniature guide pipe, a guiding guide pipe, a front Y-type valve and a rear Y-type valve. The conveying guide wire is connected with the near end of the vascular thrombus take-out support. The vascular thrombus take-out support is arranged in the protection sheath. The protection sheath is connected with the tail portion of the miniature guide pipe through the rear Y-type valve. The front portion of the miniature guide pipe is directly connected with the guiding guide pipe through the front Y-type valve. By means of the thrombus take-out device, the problems of breakage and escape of thrombi in the capturing and take-out process by means of an existing thrombus take-out device and technology can be solved, the sliding and rolling probability of thrombi stably clamped by pincers is remarkably reduced, and the operative successful rate is increased.

The invention provides a band steel welding system. The band steel welding system comprises a welding machine, welding machine inlet section equipment, a welding machine inlet section equipment main controller, a hydraulic cutter and a tension roller pressing system and further comprises a welding machine main controller and a welding machine outlet side loop device. The welding machine main controller is used for controlling the welding machine outlet side loop device to store the amount of tail band steel needed by the welding process. According to the band steel welding system, the welding machine outlet side loop device automatically stores the amount of the tail band steel needed by the welding process, the problem of band steel tail escaping is solved, achieving of the amount of overlap in the welding process is ensured, the welding seam quality is further stabilized, and the fracturing probability of welding seams is greatly decreased.

The invention relates to a desulfurization, denitrification and dust removal integrated process. According to the process, flue gas is fed into a desulfurization, denitrification and dust removal integrated tower by an induced draft fan, the flue gas moves from bottom to top, spraying liquid moves from top to bottom, an electroactive substance is selected as a catalytic reaction medium when a gas-liquid phase of the flue gas passes through an electrocatalytic reaction layer, under the effect of an electric field, an electro-catalytic reaction is carried out on the surface area of the electroactive substance, ammonia or urea in the circulating liquid is absorbed as a reducing agent to enable NOx to generate N2, meanwhile, desulfurization is carried out, then the flue gas passes through a liquid film washing layer to achieve the dust removal effect, and the purified flue gas is sent to a chimney for up-to-standard emission. The desulfurization, denitrification and dust removal integrated process has the following beneficial effects: (1) desulfurization, denitrification and dust removal cooperate with each other, and the problem of flue gas treatment is solved with high efficiency and low cost; (2) a high-consumption and high-pollution process is changed into a production process with product value; (3) denitration is not limited by temperature; (4) the problems of entrainment, soluble salt taking-out and ammonia escape in wet desulphurization are solved; and (5) the occupied area is small, and the investment cost is low.

The invention relates to a bionic trapping device for living frankliniella occidentalis. The device comprises a trapping cover (1), a trapping base (2) connected with the trapping cover (1) in a cooperative mode, a peripheral gauze screen (3) fixedly arranged on an opening of the trapping cover (1) and a central gauze screen (4) arranged in the center of the peripheral gauze screen (3); the exterior of the peripheral gauze screen (3) is provided with brackets (5) supporting the screens; the corresponding end of the opening of the trapping cover (1) is fixedly provided with a sleeve ring (6) connected with the trapping base (2) in a cooperative mode; the upper portion of the trapping base (2) is provided with a filament-imitated structure (7) with inverted hooks. The bionic trapping device is simple in structure, convenient to use, low in cost and high in flexibility, the labor efficiency can be significantly improved, the labor intensity is reduced, and the quantity of living frankliniella occidentalis trapped in the wild field is increased. A trapping method for living frankliniella occidentalis ensures the efficiency of agricultural production to the maximum degree with the purposes of achieving minimal resource consumption, most environment-friendly and fastest trapping and highest trapping number.

The invention relates to the technical field of air pollution prevention of environmental protection industries, in particular to a liquid ammonia evaporator for a denitration device line. The liquid ammonia evaporator comprises a liquid ammonia conveying pipe, one end of the liquid ammonia conveying pipe is a liquid ammonia inlet end connected with a liquid ammonia source, the other end of the liquid ammonia conveying pipe is an ammonia outlet end, and a plurality of radiating fins are arranged outside the liquid ammonia conveying pipe. According to the liquid ammonia evaporator, the radiating fins are arranged outside the liquid ammonia conveying pipe, the heat exchange area between the liquid ammonia conveying pipe and outer space is enlarged, so that liquid ammonia can be more completely gasified to form ammonia in the conveying process of the liquid ammonia, the gasification rate of the liquid ammonia is increased, so that the mixed sufficiency of the ammonia and flue gas is improved, on one hand, denitration efficiency is improved, the removal rate of nitric oxide in the flue gas is increased, on the other hand, and the liquid ammonia evaporator solves the problem that the ammonia escapes as the ammonia cannot completely react.

The invention discloses a low-temperature flue gas desulfurization and denitrification coupling absorption process capable of reducing oxidant escape. The process comprises the following steps: oxidizing a nitrogen oxide containing low-valence nitrogen in flue gas into a nitrogen oxide containing high-valence nitrogen by adopting the oxidant; then conveying the flue gas containing the nitrogen oxide containing high-valence nitrogen into a desulfurization and denitrification coupling absorption tower (3), absorbing the nitrogen oxide containing high-valence nitrogen in the flue gas into a nitrate in the desulfurization and denitrification coupling absorption tower (3) through an alkaline solution absorbent, and absorbing SO2 in the flue gas into a sulfite and a bisulfite; and meanwhile, reducing the residual oxidant in the flue gas by using the sulfite and a hydrosulfite formed by absorption in the desulfurization and denitrification coupling absorption tower (3). The process disclosedby the invention comprises three technological processes of desulfurization, denitration and oxidant removal, so that the purposes of desulfurization and denitration can be achieved, meanwhile, the discharge amount of the oxidant is remarkably reduced, the flue gas treatment process is shortened, and the problem of oxidant escape of an oxidation method low-temperature denitration process is solved.

The invention belongs to the technical field of preparation of polypropylene foam, and provides a method for foaming polypropylene plastic through low-temperature thermal expansion microspheres. The method comprises the steps that a plasticizer and a liquid state softening agent are used for lowering the softening point of polypropylene, so that the polypropylene and the low temperature thermal expansion microspheres are mixed, high-speed shearing is conducted on the polypropylene and the low temperature thermal expansion microspheres, air is introduced, and initial foam bodies are formed; andthen the thermal expansion microspheres are expanded by heating through saturated steam at a low temperature to produce foaming gas, and the polypropylene foam is prepared. According to the method for foaming the polypropylene plastic through the low-temperature thermal expansion microspheres, compared with the traditional method, cracking of foam walls, gas escaping, foam hole collapse and bubble merging in the foaming process of the polypropylene are reduced, and steam heating energy consumption is small, the recyclable effect is achieved, and environmental protection benefits are good.

The invention discloses a combined modular type large purse seine for deep and distant sea aquaculture. The boundary of the large purse seine comprises a plurality of purse seine modules which are evenly arranged, wherein each purse seine module comprises a pile foundation used for fixing, each pile foundation comprises a bottom beam frame, a plurality of fixing piles are arranged below each bottom beam frame, and a purse seine frame for blocking is arranged above each bottom beam frame; and an inner boundary frame is arranged on the inner edge of each purse seine frame, an outer boundary frame is arranged on the outer edge of the purse seine frame, a connecting frame is arranged on each of the left side and the right side of the purse seine frame, the connecting frames are connected withthe inner boundary frame and the outer boundary frame, and a protective net is arranged between the inner boundary frame and the outer boundary frame. The combined modular type large purse seine for deep and distant sea aquaculture adopts a modular assembly structure and the construction is convenient; and with adoption of the inclined protective nets, impact of ocean current stormy waves on the purse seine is effectively reduced, strength of the purse seine is improved, and service life of the purse seine is prolonged.