187results about How to "Solve Exhaust Problems" patented technology

The invention discloses a non-shutdown device for the inversion of a lifeboat diesel engine, which comprises a lubrication system and a respiratory system, wherein the lubrication system comprises an oil suction port of an oil pump and an oil tray arranged at the bottom of a crankcase; and the respiratory system comprises a main respirator holder arranged on a cylinder cover and a main respiration channel which passes through a machine body of the diesel engine. The top of the oil tray is provided with a unidirectional sealing mechanism, a main respirator check valve is arranged in the main respirator holder, a secondary respiration channel is arranged in the machine body of the diesel engine, and an advancer cover is provided with a secondary respirator check valve. The device has a simple structure and low cost, can meet the requirement stipulated in the SOLAS convention, and solve the lubrication problem of a diesel engine system and the air exhaust problem inside the crankcase when the lifeboat diesel engine is in an inverted state.

The invention discloses a soft and weak wall rock tunnel advance reinforced support construction method. When a pipe roof advance support construction is carried out on one segment of the constructed tunnel, the construction method comprises the following steps: (1) support arch and guide pipe construction, wherein a plurality of guide tubes for carrying out guiding on a plurality of pipe roof pipes are arranged on a support arch; each pipe roof pipe comprises a pipe body and a drill bit; each pipe body is formed by splicing a plurality of pipe joints; each drill bit is coaxially arranged at the front end of the pipe body; the pipe joints are spiral steel pipes; the pipe roof pipes are first pipe roof pipes or second pipe roof pipes; and the first pipe roof pipes and the second pipe roof pipes are staggered; (2) drilling machine and slip casting machine installation and emplacement; (3) pipe roof advance support construction, which comprises the following processes: first pipe roof pipe drilling and synchronous grouting construction, final hole grouting construction of the first pipe roof pipes, second pipe roof pipe drilling and synchronous grouting construction and final hole grouting construction of the second pipe roof pipes. The method disclosed by the invention is simple in steps, reasonable in design, simple and convenient to construct and good in support effect; and the soft and weak wall rock tunnel advance reinforced support process can be simply, conveniently and quickly finished.

The invention discloses an amylum category complete biodegradable material and a preparation method thereof. The amylum category complete biodegradable material comprises, by weight, the long-chain branch aliphatic polyester or long-chain branch aliphatic series- aromatic copolyesters 50-70%, the starch 20-30%, the chain extender 0.1-3% and the balance chain extender 9-17%. The preparation method comprises the steps of enabling all components to be mixed in a high speed mixer, feeding in a twin-screw extruder after accurate measurement by means of a measurement scale, and extruding and prilling by adjusting a built-up sequence of a screw and designing different exhaust ports. The amylum category complete biodegradable material and the preparation method of the amylum category complete biodegradable material solve the problems of dispersing, plasticizing and exhausting of starch filler in the twin-screw extruder, and obtained amylum complete biodegradation material not only has complete biodegradation performance, but also has excellent mechanical property and good extrusion molding working quality.

The invention relates to a remodeling fine grain soil test sample preparation device. The remodeling fine grain soil test sample preparation device is characterized in that a lower pressing plate (11) is provided with a sample preparation device consisting of a cover plate (1), a base (2) and a sample preparation cylinder (3); the lower end surface of the cover plate (1) is connected with a water permeable stone (4) as well as a sample preparation annular cutter (6); the cover plate (1) is internally provided with an air exhaust hole (8); an upper pressing plate (12) is provided with a pressure device (9). A wet soil sample is put into a sample preparation room; the pressure device presses a soil body into the annular cutter, and a prepared test sample annular cutter is taken out, and soil samples at two ends of the annular cutter are cut evenly, and the test sample preparation operation is completed. The remodeling fine grain soil test sample preparation device provided by the invention has the advantages that the problems of remodeling soil preparation unevenness and test sample dimension restriction are solved, and the problem of air exhaust during the fine grain soil sample preparation process is solved; the dry density of a test sample is controllable, and the prepared test sample has less errors; the operation is convenient; the sample discharge is simple; the preparation is rapid.

The invention relates to an infusion set and belongs to the technical field of medical apparatus and instruments. The infusion set comprises a puncture outfit, an upper conduit of a drop funnel, a drip tube, the drop funnel, a lower conduit of the drop funnel, a regulator and an intravenous needle which are sequentially connected. The liquid outlet end of the intravenous needle is sleeved with a sealing sleeve; an air exhaust pipe is arranged between the drop funnel and the lower conduit of the drop funnel; at least one air exhaust hole is formed at one end, which is positioned in an inner cavity of the drop funnel, of the air exhaust pipe; a liquid medicine passing membrane made from a material which is permeated by water is arranged above the air exhaust pipe; a group of pores are formed on the liquid medicine passing membrane; the liquid medicine passing membrane allows liquid medicine and gas to pass through but blocks insoluble granules with the diameter of greater than the diameter of the pores in the liquid medicine; the sealing sleeve seals the liquid outlet end of the intravenous needle; and an air filter is arranged on the sealing sleeve. The infusion set is simple in structure and has self-exhausting and automatic liquid-stopping functions.

The invention discloses a nano-fiber anti-microbial fruit-vegetable preservative film with a porous structure, and a preparation method and application. According to the invention, myoporum bontioides leaves are grinded into powder and treated by supercritical extraction, so that a myoporum bontioides extract is obtained; a water solution containing TWEEN-80 is added into the myoporum bontioides extract, and the mixture is filtered, so that a myoporum bontioides supercritical extract solution is obtained; the myoporum bontioides supercritical extract solution, a polyvinyl alcohol solution, a chitosan derivative solution and a nano-titania solution are mixed, so that a mixed spinning solution is obtained; and the mixed spinning solution is treated by spinning of a static spinning machine, so that the nano-fiber anti-microbial fruit-vegetable preservative film with the porous structure is obtained. The preservative film has the advantages of a large specific area, a high porosity, high finger uniformity, good mechanical properties and the like, also has performance such as a good moisture permeable and gas permeable property and a good moldproof and anti-microbial property, and has high application potential in the food packaging field.

A dynamic carbon and static carbon mutual conversion method includes: planting rank vegetations, and repeatedly cutting and storing to convert 'dynamic carbon' in the atmosphere into 'static carbon' in the biosphere; controlling biomass oxidation quantity to balance the total quantity of 'dynamic carbon' in the atmosphere; intervening soil wind erosion, rock weathering, monsoon circulation and ocean current distribution regularities to restrain 'static carbon' in the biosphere, the hydrosphere and the lithosphere from transferring into the atmosphere; increasing biomass in coastal wetlands, continental shelf shallow areas, rivers and lakes to promote 'static carbon' in the hydrosphere to transfer into the lithosphere; replacing fossil fuels with clean energy to reduce incremental quantityof 'dynamic carbon' in the atmosphere; developing new climate economy to increase bio-carbon products and increase storage of 'static carbon' in the biosphere; clearing 'dynamic carbon' in the atmosphere according to physical and chemical methods so as to regulate the greenhouse effect, eliminate dust haze, slow down global climate change speed and prolong survival time of human on the earth.

The invention provides an adhesive for a plywood, prepared from the following raw materials according to parts by weight: 70-80 parts of dispersion medium, 20-35 parts of degreased soyabean protein powder, 0.5-3 parts of sodium carbonate, 2-6 parts of urea, 1-2 parts of complexing agent and 1-5 parts of enhancer. The adhesive provided by the invention has the characteristics that all the components have excellent mutual synergistic effect, a materials such as a metal salt is compounded with the soybean protein, and simultaneously, glutaraldehyde is taken as the enhancer so that the problem of poor water resistence of the common soybean protein adhesive is solved; therefore, the adhesive is capable of meeting the waterproof requirement of the adhesive for the plywood and guaranteeing the practical performance of the soybean protein adhesive; and the plywood prepared by using the adhesive provided by the invention is capable of meeting the international requirements of the class II plywood. Besides, the invention also provides a method for preparing the adhesive for the plywood; and the method is simple in process, convenient for operation and suitable for popularization and application.

The invention discloses a soybean aldehyde-free adhesive and a preparation method thereof. The soybean aldehyde-free adhesive is prepared from 27-33 parts of degreased protein powder, 1-2 parts of denaturing agent, 0.001-0.003 part of viscosity reducer, 0.5-2.0 parts of emulsifying agent, 7-20 parts of reinforcing agent and 65-73 parts of dispersion medium. The preparation method comprises the steps of dispersion, mixing, heating, stirring and the like. The soybean aldehyde-free adhesive has the advantages that the water-tolerant requirements for the adhesive for artificial boards can be met, the practical performance of the protein adhesive is ensured, and the problem of formaldehyde pollution caused by the artificial boards to indoor air is thoroughly solved; the main raw materials are renewable resources, and the adhesive is in conformity with the principle of environmental protection and sustainable development.

The invention discloses a soybean meal-based adhesive for wood and a preparation method thereof. The soybean meal-based adhesive is prepared from the following materials in parts by weight: 60-70 parts of dispersing medium, 20-35 parts of defatted soybean protein powder, 0.5-2 parts of sodium dodecyl benzene sulfonate, 1-8 parts of cross-linking reinforcing agent and 1-8 parts of sodium benzoate. The preparation method comprises the following steps: adding the defatted soybean protein powder and the sodium dodecyl benzene sulfonate to a dispersing medium; uniformly stirring, and keeping temperature at 60-80 DEG C for 3-6 hours; and then reducing the temperature of an obtained mixture to 25-35 DEG C, adding the cross-linking reinforcing agent and the sodium benzoate, and uniformly stirring. The preparation method disclosed by the invention has the advantages of simple process and convenience for operation; and the produced adhesive is free of formaldehyde, and main raw materials are derived from renewable substances, and thus safety and environmental friendliness are achieved.

The invention discloses a vented anchoring and grouting device for a common anchor rod and a using method thereof. The vented anchoring and grouting device includes an anchor rod, fastening nuts, a sealing washer, a venting grouting composite end socket, a tray, a venting grouting integrated pipe, an inflatable elastic grouting-stop plug, a guide protection cover, a sealing dustproof film, and ananchoring agent. According to the vented anchoring and grouting device for the common anchor rod, a venting passage and a grouting passage are separately arranged, and the venting grouting composite end socket is fixed in a borehole through the inflatable elastic grouting-stop plug; and according to the vented anchoring and grouting device for the common anchor rod and the using method thereof, inthe process of mounting the common anchor rod, by adding the device, a mounting hole can be directly used as a grouting hole for grouting without affecting normal pre-tightening force reinforcement of the common anchor rod, while a rock mass is reinforced, a common end socket anchoring anchor rod is changed to full length anchoring, the vented anchoring and grouting device solves the problems ofventing and plugging in the processes of anchoring and grouting support and grouting, the grouting effect is improved, and construction workload and the support cost of anchoring and grouting are reduced.

The invention discloses a soybean meal-based wood-based panel adhesive and a preparation method thereof, which is prepared from 20-50 parts of defatted protein powder, 1-5 parts of a denaturant, 1-30 parts of a strengthening agent, and 60-80 parts of a dispersion medium. The method includes the steps of dispersing, mixing and stirring; the advantages of the present invention are: it can meet the water resistance requirements of the adhesive for wood-based panels, and ensure the practical performance of the protein adhesive; it completely solves the problem of formaldehyde pollution in the indoor air caused by the wood-based panels; The main raw materials are renewable resources, in line with the principles of environmental protection and sustainable development.

The invention relates to an exhaust valve, and provides an exhaust valve with dual control chambers and dual floating bodies. A sealing floating body is arranged at an exhaust port of a valve base of a lower valve cover and connected with a lower floating rod in a telescopic floating rod. An upper floating rod in the telescopic floating rod passes through an internal valve base of a valve body and is connected with the upper floating body. A locating slot is formed in the outer side of the lower side of the upper floating rod, and a locating pin matched with the locating slot is further arranged on the outer side of the lower floating rod. The lower floating body is arranged in the middle of the lower floating rod, sealing gaskets are arranged on the lower floating body, and a sealing gasket and spring bases are also arranged on the upper floating body. Groove spring bases are arranged on the lower side of an upper valve cover, an exhaust hole is further formed in the middle of the upper valve cover, and buffer springs are arranged between the spring bases of the upper floating body and the groove spring bases of the upper valve cover. A filter screen is further arranged at a water inlet end of the lower valve cover and is fixed with fixing clamp rings. Debris can be prevented from entering into the valve body, the safety of a water delivery pipeline can be guaranteed, and the exhaust valve with dual control chambers and dual floating bodies is good in sealing property, simple in structure, convenient to maintain and long in service life and also has a filtering function.

The invention relates to an adhesive for artificial boards, and a preparation method and application thereof. The adhesive for artificial boards is prepared from a dispersion medium, a protein substance, an alkaline compound and a crosslinking reinforcer, wherein the crosslinking reinforcer is a tannin-glyoxal resin. The adhesive for artificial boards is free of formaldehyde, is mainly prepared from renewable substances, and thus, is an environment-friendly adhesive for artificial boards; the adhesive provided by the invention thoroughly solves the problem of formaldehyde pollution when in use, and ensures water resistance, adhesion strength and other practical properties of the adhesive; compared with the prior art, the components have favorable synergetic effects, so that the effect is enhanced; the preparation method is simple, does not need very long curing time, is convenient to operate and has high production efficiency; and generally, the method comprehensively utilizes the resources, saves the production cost, conforms to the principles of environmental protection and sustainable development, and has favorable application prospects.

The invention discloses a grafted nano ambary fiber crystal whisker modified urea formaldehyde resin adhesive and a preparation method thereof. The grafted nano ambary fiber crystal whisker modified urea formaldehyde resin adhesive is prepared from formaldehyde, urea, polyvinyl alcohol and a reaction enhancer, wherein the mole ratio of the formaldehyde to the urea is (1.1-0.95):1, and the addition amount of the polyvinyl alcohol is 0.1-0.8% of the total weight. The addition amount of the reaction enhancer is 0.1-3.0% of the total weight. The preparation method comprises the following steps: adding the reaction enhancer, adding the first batch of urea according to a mole ratio of (2.0-2.2):1, adding the second batch of urea according to the mole ratio of (1.4-1.2):1, and finally, adding the third batch of urea according to the mole ratio of (0.95-1.1):1. By using the formaldehyde and urea in a low mole ratio as the raw materials, the self-made acrylic acid grafted nano ambary fiber crystal whisker is added to increase the molecule branching degree and molecular weight of the resin, so that the low-mole-ratio urea formaldehyde resin has the advantages of low formaldehyde content, high adhesion strength and low cost.

The invention relates to a patch-type filamentous fuse and a manufacturing method thereof. The invention has the technical scheme that one or a plurality of strips of fuse materials with the same or different specification are stuck or welded at the electrode position of a base board in a certain mode, and then are encapsulated by resin or other suitable insulation materials and cut to obtain the granular fuse. Because automatic fuse feeding and fuse cutting by the machine are adopted, the lengths of the fuse body are basically consistent, so the performance of the product is ensured. The invention has the advantages of greatly improving the consistency of the performance of the patch-type fuse, effectively reducing the production cost of the patch-type fuse, ensuring the quality of the product and improving the reliability of the product. The scheme also has the advantages of simple and practical technology and the like, and has better application and popularization value.

The invention discloses a formaldehyde-free bean-pulp-base artificial board adhesive and a preparation method thereof. The formaldehyde-free bean-pulp-base artificial board is prepared from 60-70 parts of dispersion medium, 20-35 parts of degreased bean albumen powder, 0.1-0.8 part of sodium hydroxide, 5-10 parts of polyethyleneglycol, 0.5-3 parts of sodium bisulfite, 0.1-2.0 parts of crosslinking reinforcer and 1-5 parts of sodium benzoate. The preparation method comprises the following steps: adding the degreased bean albumen powder, crosslinking reinforcer, sodium hydroxide, sodium bisulfite and polyethyleneglycol into the dispersion medium, stirring uniformly, and keeping the temperature at 60-80 DEG C for 3-6 hours; and cooling the mixture to 25-35 DEG C, adding the sodium benzoate and stirring uniformly. The method is simple in technique and convenient to operate; the produced adhesive is free of formaldehyde, and the main raw materials are derived from renewable substances; and thus, the formaldehyde-free bean-pulp-base artificial board is safe and environment-friendly.

There is provided a water curtain cultivation system capable of a geological circulation of groundwater and an artificial recharge of rainwater. The system according to the present invention comprises: a greenhouse (10) including an inner house (11) and the outer house (12); a water curtain space (13); a water curtain forming pipe (20) installed above the water curtain space in a length directionof the inner house; a groundwater supplying unit (30) including a groundwater supply hole (31) to supply the groundwater at a position proximate to the house where the groundwater is supplied to the water curtain forming pipe; a groundwater supplying unit (30) which pumps groundwater from a groundwater supply hole (31) near the greenhouse (10) and supplies to the water curtain forming pipe (20); a groundwater returning unit (40) which collects the groundwater injected from the water curtain forming pipe (20) for forming water curtain into a storage tank (43), and returns the collected groundwater to the under ground by a sill hole (46) and a alleviation hole (47) both distanced from the groundwater supply hole (31); and a rainwater supplying unit (50) including: a rainwater collection channel (51) formed longitudinally at a lower position outside of the outer house, and a rainwater supply pipe installed to be operatively connected to the rainwater collection channel and the groundwater return and storage tank.

The invention discloses a particle filter positioning and map construction method based on an adaptive genetic algorithm. The method comprises the steps of: initializing; judging whether the current position of the robot reaches the ending position; estimating the state; matching features; updating the state; estimating path; and optimizing the path distribution of robot at a k moment using an adaptive genetic algorithm. According to the particle filter positioning and map construction method based on an adaptive genetic algorithm, a particle set representing a path posterior distribution is optimized using an adaptive genetic algorithm, resampling in general particle filter SLAM method is eliminated, the problem of particle depletion caused by resampling is solved and the running efficiency of the whole SLAM system is improved.

A toner in which even a toner containing crystalline polyester exhibits excellent fixing property, chargeability, color reproducibility, and long-term stability, as well as a two-component developer, a developing device, and an image forming apparatus are provided. The toner includes toner base particles which contain a colorant and a binder resin containing at least crystalline polyester and an amorphous resin; and a mixed oxide of aluminum oxide and silicon dioxide externally added to the toner base particles, and the toner is so adjusted that the binder resin contains 20% by weight to 50% by weight of the crystalline polyester and that a compositional proportion of aluminum oxide in the mixed oxide of aluminum oxide and silicon dioxide falls within a range of 35% by weight or more and less than 50% by weight.

The invention relates to a method, terminal and system for reusing an MAC address. The method comprises the steps that the terminal sends RARP detection messages to an RARP server through an initial MAC address which is obtained arbitrarily, and the RARP detection messages carry a virtual MAC address; if the terminal repeatedly sends the RARP and after a preset frequency is reached, the response messages of the RARP server are not received at all, and then the virtual MAC address is used as a real MAC address to conduct normal communication. According to the method, terminal and system for reusing the MAC address, based on a dynamic negotiation mechanism of the MAC address of an RARP protocol, the MAC address is automatically generated, static allocation of the MAC address is adjusted to be dynamic allocation, and the problems that the MAC address is wasted and not enough to use is solved fundamentally.

The invention belongs to the technical field of casting machining, and particularly designs a low-pressure casting die for a new energy automobile motor shell with an end cover. The low-pressure casting die comprises an upper die, a side die set and a lower die. The upper die comprises an upper die base, an upper die head and an upper die core set. The upper die base and an upper die core set arefixedly connected through the upper die head. The lower die comprises a lower die base and a lower die core which are fixedly connected. The side die set is formed by three mutually-matched side dies.When the upper die, the side die set and the lower die are assembled, a motor shell pouring cavity is defined by the upper die core set, the side dies and the lower die core. By adoption of the abovescheme, the low-pressure casting die has the beneficial effects that the whole set of die is divided into three parts, meanwhile, the side die with the largest size is divided into three parts, the size of each part is greatly reduced, the structure is simplified, and machining is convenient.

The present invention discloses a hot-melt connecting spigot-and-socket pipe fitting for aluminium plastics composite pipe. At least one end of said pipe fitting possesses adjacent spigot-and-socket part and internal layer connecting part, the rear portion of said spigot-and-socket part is equipped with an exhaust viewing hole, and the internal and external layer hot-melt connections of said joint are not identical in length, so that said invention can completely solve the exhaust problem produced when the aluminium plastics composite pipe and spigot-and-socket pipe fitting are hot-melt connected.

The invention discloses a two-phase liquid cooling system. The two-phase liquid cooling system comprises a condenser, a refrigerant pump and a refrigeration tail end; the condenser is connected with the inlet of the refrigerant pump; at least one branch of the outlet of the refrigerant pump is connected with the condenser by use of the refrigeration tail end; a liquid storage tank for storing the refrigerant is arranged between the condenser and the refrigerant pump; a flow control device is arranged between the outlet of the refrigerant pump and the refrigeration tail end. The cooling system is applied to the fields of power electronics and telecommunications; the adopted refrigerant is Freon, and is good in insulation property and gaseous under normal pressure, and therefore, even though the refrigerant leaks, the potential safety hazard of short circuit can be avoided; as a result, the problems of water leakage short circuit, regular exhaust maintenance and the like due to a water cooling system are solved; meanwhile, due to two-phase heat exchange, the heat exchange coefficient is high and the problem of insufficient heat dissipation density of forced air cooling is solved. The Freon is adopted to realize two-phase heat exchange, and the phase-change gasification latent heat is far higher than that of single-phase heat exchange of traditional water cooling; as a result, under the same heat exchange amount, the flow of the refrigerant needed by two-phase liquid cooling is far smaller than that of the traditional water cooling system.

The invention discloses a stone paint mixed with glass beads. The stone paint is prepared from, by mass, 8-14% of water, 0.1-0.2% of hydroxyethyl cellulose, 18-24% of special emulsion, 30-55% of all colors of natural quartz sand, 20-45% of glass beads, 0.01-0.1% of a wetting agent, 0.01-0.5% of a dispersing agent, 0.01-0.05% of a defoaming agent, 0.1-0.3% of a thickening agent and 0.05-0.5% of a coalescing agent. According to the stone paint, the brightness of the stone paint is enhanced by using the reflecting and refracting effects of glass beads to light; besides, the durability of glass beads is good, the color of the stone paint is not likely to change obviously after the stone paint is used for a long time, and the stone paint has the advantage that the brightness, the boldness of colors and the color retention are not affected; in addition, glass beads are used for partially replacing natural quartz sand, and the problem of mineral resource exhaustion caused by over exploitation of natural quartz ore can be well solved.

The invention discloses an advance support construction method for a high-strength pipe shed of a tunnel. A process for carrying out advance support construction on a pipe shed of one segment of a constructed tunnel comprises the following steps: (1) constructing support arches and guide pipes; (2) installing a drilling machine and a grouting machine in place; (3) carrying out advance support construction on the pipe shed: (301) preparing before drilling; (302) drilling pipe joints at front ends and synchronously grouting; (303) connecting the pipe joints; (304) continuously drilling and synchronously grouting; (305) repeating the steps (303) and (304) many times until the drilling processes of pipes of the current constructed pipe shed are finished; (306) blocking drill holes; (307) carrying out grouting construction on final holes; (308) repeating the steps (301) to (307) many times until all advance support construction processes of the pipes of the pipe shed are finished; and (4) carrying out excavation construction on the tunnel. The method disclosed by the invention is simple in step, reasonable in design, simple and convenient in construction and good in support effect; and by adopting automatic drilling type high-strength pipes of the pipe shed, the advance support process of the tunnel can be simply, conveniently and quickly finished.

The invention provides an additive with urea formaldehyde, a preparation method and a urea formaldehyde resin adhesive. The additive is provided by the invention. The raw material of the additive is comprised of the dispersion medium, the dried egg white of the degreased bean and the complexing agent, the weight ratio of the raw material is: 70-80 of dispersion medium, 20-35 of dried egg white of the degreased bean, 1-3 of complexing agent, the complexing agent is consisted of the aluminium sulphate and the zirconium carbonate with the weight ratio of 0.4-2.4:1. The additive provided by the invention contains dried egg white of the degreased bean, and then both the bond strength of the prepared veneer is increased and the formaldehyde emission of the preparing artificial slabs is effective decreased when adding the additive into the urea formaldehyde.

The invention discloses a soybean meal lignin-based adhesive and a preparation method thereof. The soybean meal lignin-based adhesive is prepared from 20-50 parts of defatted protein powder, 1-5 parts of a denaturant, 1-30 parts of a reinforcing agent and 60-80 parts of a dispersion medium. The preparation method comprises the steps of dispersing, mixing, stirring and the like. The soybean meal lignin-based adhesive and the preparation method thereof have the following advantages: the problems of poor water resistance, low dry cementation strength and poor boiling resistance of a common protein adhesive are solved, the water-proof requirement of an adhesive for artificial boards can be satisfied, and the practicability of the protein adhesive is guaranteed; the problem of exhaustion of synthetic fossil raw materials used in conventional artificial board adhesives can be favorably solved, and the environmental protection and sustainable development principles can be conformed; resources are comprehensively utilized, the production cost is lowered and the product added value is improved.

The invention discloses novel fine-grained concrete based on a green geopolymer and dredged sand. The novel fine-grained concrete is prepared from the following main raw materials: fly ash, metakaolin, water glass, sodium hydroxide, dredged sand, waste ceramic powder, polypropylene fibers, a superplasticizer and water. The invention further discloses a preparation method of the fine-grained concrete, which comprises the following steps: S01, adding metakaolin and fly ash into a stirrer, stirring the raw materials for 1 minute and adding an alkali activator solution; S02, adding dredged sand, waste ceramic powder and polypropylene fibers, then adding a polycarboxylate superplasticizer and water; S03, adding the uniformly mixed materials into a test mold layer by layer and step by step; andS04, covering the surface of the test mold with a film after molding, and maintaining the test piece to a specified age under standard conditions after demolding. According to the novel fine-grained concrete based on the green geopolymer and the dredged sand and the preparation method of the novel fine-grained concrete, industrial waste residues such as waste dredged sand and fly ash can be utilized, and the novel fine-grained concrete with excellent performance is prepared.

The invention discloses a formaldehyde-free defatted soy flour-based adhesive for a fiberboard and a preparation method of the adhesive. The formaldehyde-free defatted soy flour-based adhesive is prepared from 45-65 parts of protein substances, 0.5-5 parts of basic compounds, 0.5-5 parts of an emulsifier and 35-55 parts of a crosslinking enhancer as raw materials. The preparation method comprises the following steps of dispersing, cross-linking and carrying out spray drying. The formaldehyde-free defatted soy flour-based adhesive has the advantages that the product is high in quality and free of formaldehyde; main raw materials are derived from renewable substances, the problem of formaldehyde pollution in use of the adhesive is completely solved and meanwhile, the practical performances such as water resistance and bonding strength of the adhesive are ensured; and the preparation method is simple, convenient to operate and high in production efficiency and very long curing time is not required.