31results about How to "Reduce the burden of purification" patented technology

The invention relates to a method for preparing electrolytic manganese metal by using high-iron and high-phosphor manganese ores. The method comprises the following steps of: respectively carrying out ball-milling on high-iron and high-phosphor manganese ores and iron pyrites to form powders, mixing the powders in proportion and roasting in a self-manufactured roasting device, leaching the mixture subjected to sulfating roasting by taking water as a leaching agent to obtain a manganese sulfate solution, removing impurities from the manganese sulfate solution to obtain a manganese sulfate electrolyte, adding an electrolysis additive to the manganese sulfate electrolyte, simultaneously adding ammonium salt serving as a buffering agent to the solution, putting the electrolyte into an electrolytic cell, switching on direct current and maintaining constant temperature so that an electroextraction effect is generated to separate out the manganese metal on a cathode, purifying, washing, drying and peeling the separated manganese metal, thus obtaining the electrolytic manganese metal product. The method is short in technological process, hardly pollutes the environment and and is suitable for development and application of low-grade high-iron and high-phosphor manganese ores.

The present invention provides a process for producing 5-iodo-2-methylbenzoic acid by iodizing 2-methylbenzoic acid, which comprises, as essential steps, a reaction step in which 2-methylbenzoic acid is iodized in the presence of a microporous compound, iodine, an oxidizing agent, and acetic anhydride and a purification step in which sublimation, distillation, crystallization, or a combination of two or more of these is conducted. By the process, 5-iodo-2-methylbenzoic acid, which is useful in functional chemicals such as medicines, can be easily obtained as a high-purity compound in a high yield. The production steps comprising reaction and separation / purification are simple from the standpoint of process operation and the purification load is small. Furthermore, the microporous compound, e.g., a zeolite catalyst, separated and recovered from the liquid resulting from the reaction can be repeatedly used after a simple treatment. Consequently, the catalyst has a long life and the target compound can be produced by the efficient process.

The invention discloses an integrated system for production, storage, transportation and utilization of hydrogen energy on the basis of solar energy and biomass gasification. The integrated system comprises four parts namely a hydrogen production sub-system, a hydrogen storage sub-system, a hydrogen transportation sub-system and a hydrogen utilization sub-system, wherein the hydrogen production sub-system comprises a heliostat, a gasification reactor, a pre-heater and a cooling purifier; the hydrogen storage sub-system comprises a new gas compressor, a gas-steam combined cycle device, a methanol heat exchanger, a methanol synthetic tower, a gas-liquid separator, a rectifying tower and a methanol tank; the hydrogen transportation sub-system comprises a transportation device, wherein the methanol tank is connected with a methanol storage station by virtue of the transportation device; the hydrogen utilization sub-system comprises the methanol storage station, a trough type solar absorber / reactor, a hydrogen pressure swing adsorption purification device, a city gas pipe network system, a hydrogen station and a fuel cell. By adopting the integrated system disclosed by the invention, hydrogen can be prepared by making full use of renewable energy sources; the efficient storage and long-distance transportation of hydrogen energy can be realized by virtue of a high-quality carrier namely methanol; moreover, the problems of unbalanced resource distribution and economic development at present are solved.

The invention belongs to the field of air purification and discloses a purification device for removing air-carried life particles. The purification device comprises a guiding jet device, a particle collector, at least one filter, an axial flow fan and a casing. By utilizing air jet flow impact, the life particles in the air are separated and inactivated, and thus sterilization efficiency is improved; air flow flows through a filtering device, so that the remaining air-carried particles are removed, and finally an effect of purifying indoor air is achieved. According to the device, a microwave heating method is further adopted, so that the whole device, and particularly the filter, maintain a dry state, and reproduction of microorganisms in the purification device and on the wall of the purification device is avoided. The device can be placed in an indoor air purifier or an air conditioning system pipeline, and is of great significance for reducing the content of disease source particles in the air and improving workers' health level and safety guarantee capacity of a building.

The invention discloses a mixing pool charging mechanism for treating wastewater and relates to the technical field of wastewater purification. The mixing pool charging mechanism comprises a feeding tank and a mixing tool, wherein a stirring device is further arranged between the feeding tank and the mixing tool; a cavity in the stirring device is divided into a stirring cavity, a filtering cavity and an input water filtering cavity; the filtering cavity is provided with filter net cloth; a water inlet is formed in the input water filtering cavity; the input water filtering cavity is internally provided with input water filter cloth; the mixing pool and the stirring device are communicated through a medicine outlet pipe; one end of the medicine outlet pipe is arranged in the filtering cavity through a medicine outlet and the other end of the medicine outlet pipe extends back and forth between a water inlet end and a water outlet end of the mixing pool in a snake shape; a plurality of medicine outlet holes are formed in the medicine outlet pipe. The mixing pool charging mechanism disclosed by the invention has the advantages that medicines are uniformly mixed, purification load of following procedures is reduced, the purification efficiency is improved and semi-purified water can be used as water for diluting the medicines.

The invention discloses an experimental biological safe purifying platform. The experimental biological safe purifying platform comprises an operating platform frame; a working box is arranged at thecenter of the front side of the operating platform frame; a workbench is arranged at the bottom of the working box; semi-circulating air purifying mechanisms are arranged at the top and the bottom ofthe operating platform frame; glass walls are arranged on the side surfaces of the working box; a square hole is formed in the center of the front side surface of the working box; the top end of the square hole is movably connected with an operating window door; an anti-interference air purifying mechanism is arranged at the connection position of the operating window door and the square hole; theanti-interference air purifying mechanism is connected with the semi-circulating air purifying mechanisms; and a non-light experiment mechanism is arranged on the back side surface of the working box. According to the device, the working box still can maintain the clean environment when the operating window door is opened to perform experiment; meanwhile, the device can adapt to various experimental environments, so that the use range of the device is wider; in addition, part of air passing through the working platform can be completely utilized, waste is avoided and the burden of the air purifying device can be reduced.

The invention relates to a high-concentration dust pregrading device and method. The high-concentration dust pregrading device is arranged between a gas-collecting hood suctioning pipeline and purifying equipment, and comprises a pipeline, baffling plates, blocking plates and a dust collector, wherein the baffling plate is arranged in the pipeline, a plurality of relatively-independent flow channels are formed in the pipeline, and dust settling grooves are formed in the side surfaces of the baffling plates; the dust collector is arranged under the flow channels, and the plurality of blocking plates are arranged along a flowing direction of airflow and towards the direction of the bottom end of the dust collector from the baffling plates, and are arranged at the bending positions of the baffling plates, so that a plurality of spaced and communicated spaces are formed in the dust collector. The high-concentration dust pregrading device and method have the advantages that large-granular dust impacts the baffling plates under the action of self inertiam and falls into the dust collecting chamber along the wall surfaces of the dust settling grooves; in order to prevent a large amount ofairflow from rushing into the dust collecting chamber and prevent the large-granular dust from being rolled up by the airflow, the blocking plates are arranged at the lower ends of baffling points ofthe flow channels; after the baffling plates are impacted for multiple times, the large-granular dust is settled gradually, so that the purpose of pre-separating the large-granular dust at the frontend of a dust remover is achieved and the purifying burden of a back-stage dust remover is reduced.

The invention relates to the technical field of petrochemical waste gas treatment and in particular relates to a high-efficiency petrochemical waste gas treatment device. The high-efficiency petrochemical waste gas treatment device comprises a waste gas pretreatment unit, a waste gas purification unit and a water circulation unit; the waste gas pretreatment unit is composed of a waste gas separation unit and a waste gas prewashing unit; the waste gas purification unit comprises a purification pool; a biodegradation unit, a plant purification unit and a photo-catalytic oxidation unit are sequentially arranged in the purification pool from bottom to top; the biodegradation unit comprises a placement channel; the placement channel transversely penetrates through the purification pool; a replaceable biodegradation mechanism is inserted into the placement channel. According to the high-efficiency petrochemical waste gas treatment device disclosed by the invention, the waste gas treatment difficulty can be reduced, the waste gas purification ability and efficiency are improved, so that a recyclable biology-environment balance system is established by the whole device, and the purification degree of the waste gas can be effectively improved.

The invention discloses a spiral air inlet mechanism for an air purifier. The spiral air inlet mechanism for the air purifier comprises a housing, an outer pipe and an air inlet pipe; the outer pipe is arranged on one side of the top end of the housing and communicates with the housing; an air inlet is formed in the end of the outer pipe; the air inlet pipe is arranged on one side of the bottom ofthe housing; one end of the air inlet pipe is arranged in a bending manner and communicates with the housing; an air outlet is formed in the other end of the air inlet pipe; a spiral pretreatment belt is arranged in the air inlet pipe and is arranged on the inner wall of the air inlet pipe in a rotating and disc-attached manner; an activated carbon particle belt is arranged on the inner side surface of the spiral pretreatment belt; and the housing internally comprises a transmission motor and a blowing fan. The spiral air inlet mechanism for the air purifier has the advantages that the efficiency is high, the energy consumption is low, and particles and bacteria can be pretreated, so that the service life of a filtering element is prolonged; and the spiral air inlet mechanism for the airpurifier has broad market prospects and application prospects.

The invention relates to the technical field of domestic sewage purification treatment, in particular to domestic sewage purification treatment equipment with a liquid suction function and a use method. A liquid suction assembly based on a piston is adopted so that the device can realize automatic liquid suction; a filter screen is used for filtering larger impurities in the sewage, the subsequentpurification burden is reduced, and the larger impurities are blocked on the left side of the filter screen and lifted into a slag receiving cavity so that the larger impurities are convenient to collect and are subsequently discharged from a slag discharge pipe; a conversion assembly is adopted so that a driving assembly enables a fourth rotating shaft to rotate forwards and backwards through the conversion assembly; in this way, a stirring assembly arranged at the bottom end of the fourth rotating shaft rotates along with the fourth rotating shaft, sewage and chemicals flowing into a preparation box are stirred and mixed through transverse stirring rods and vertical stirring rods, and purification treatment is conducted; the stirring rod periodically rotates forwards and backwards so that the turbulence intensity is effectively improved, and the medicament treatment effect is improved.

The invention relates to a method for preparing a manganese sulfate electrolyte. The method comprises the following steps: respectively putting high-phosphorus high-iron manganese ore and iron pyrite into a ball mill; ball-milling the high-phosphorus high-iron manganese ore and iron pyrite into powder, mixing the powder according to a proportion and then performing sulfating muffle roasting; leaching the manganese ore treated by means of sulfating roasting with water as a leaching agent, and thereafter leaching a part of liquid in the next layer with sulfuric acid; then removing impurities from the manganese sulfate solution to obtain qualified manganese sulfate electrolyte. By adopting water and a little sulfuric acid as the leaching agent, the method disclosed by the invention not only increases the extraction rate of manganese but also effectively inhibits leaching of phosphorus and iron, prevents impurities from entering the solution, improves the quality of subsequent products, not only greatly reduces the purification burden to the manganese sulfate solution during subsequent operation, and also realizes preparation by using raw materials including low-grade pyrolusite and the like.

The invention relates to a wastewater recycling system which comprises a first water pump, a settling pond, a cooling tower, a filtering pond, a second water pump and an exhaust fan. The water inlet of the first water pump is communicated with the water outlet of a PVC production device through a first water pipe, the water outlet of the first water pump is communicated with one end of the settling pond through a second water pipe, the other end of the settling pond is communicated with the water inlet of the cooling tower through a third water pipe, the water outlet of the cooling tower is communicated with one end of the filtering pond through a fourth water pipe, the other end of the filtering pond is communicated with the water inlet of the second water pump through a fifth water pipe, and the water outlet of the second water pump is communicated with the water inlet of the PVC production device through a sixth water pipe. The first water pipe is circuitous and is wrapped by a box body, the air inlet of the exhaust fan is communicated with the box body, and the air outlet of the exhaust fan faces one side of the PVC production device. Compared with the prior art, the wastewater recycling system can cool, filter and recycle hot wastewater, use dissipated heat for heating at the same time and improve resource utilization rate.

The invention discloses a filter type anti-vacuum oil mist absorbing cover. The technical scheme mainly includes that a reasonable annular cavity is formed between a lower packing seal cover and an upper packing seal cover, and a segmented filter is mounted in the reasonable annular cavity via a plurality of L-shaped support frames, an upper-layer segmented compression ring, a lower-layer segmented compression ring, fixing bolts and support frame bolts; a U-shaped oil return pipe is mounted in two symmetrical oil return screw holes on the inner side of the segmented filter, and oil mist absorbing pipes are arranged on oil mist absorbing holes on two sides of the lower packing seal cover; and a segmented flow guide cover is fixed onto the upper packing seal cover, a segmented flexible sealing body is arranged at the upper end of the segmented flow guide cover, a plurality of layers of segmented retaining collars are mounted on the inner side of the segmented flow guide cover, and the segmented flow guide cover is concentric with a spindle. According to the technical scheme, the filter type anti-vacuum oil mist absorbing cover can be widely applied to the field of hydroelectric power generation.

The invention relates to a method for preparing a manganese sulfate electrolyte. The method comprises the following steps: respectively putting high-phosphorus high-iron manganese ore and iron pyrite into a ball mill; ball-milling the high-phosphorus high-iron manganese ore and iron pyrite into powder, mixing the powder according to a proportion and then performing sulfating muffle roasting; leaching the manganese ore treated by means of sulfating roasting with water as a leaching agent, and thereafter leaching a part of liquid in the next layer with sulfuric acid; then removing impurities from the manganese sulfate solution to obtain qualified manganese sulfate electrolyte. By adopting water and a little sulfuric acid as the leaching agent, the method disclosed by the invention not only increases the extraction rate of manganese but also effectively inhibits leaching of phosphorus and iron, prevents impurities from entering the solution, improves the quality of subsequent products, not only greatly reduces the purification burden to the manganese sulfate solution during subsequent operation, and also realizes preparation by using raw materials including low-grade pyrolusite and the like.

The invention discloses a waste high-temperature pyrolysis furnace, which comprises at least one pyrolysis furnace body, an inclined feeding channel, a flue gas flow device, an induced draft fan assembly, a tail gas purification device and a smoke exhaust pipe, an inclined feeding channel and a pyrolysis furnace body One end of the connection is equipped with the flue gas flow device, the flue gas is purified for the first time when passing through the inclined feeding channel, and then purified by the exhaust gas purification device for the second time, so the purification burden of the exhaust gas purification device is small and can Effectively reduce dust impurities and toxic substances in the flue gas.

The invention relates to a bismuth extraction method based on bismuth sulfide ore phase conversion. The bismuth extraction method comprises the following steps of, mixing a phase conversion agent andbismuth sulfide ore to obtain mixed slurry, wherein the phase inversion agent comprises sulfonic acid, preferably, the bismuth sulfide ore is bismuth sulfide concentrate; placing the mixed slurry in areaction kettle, performing oxygen pressure phase conversion reaction treatment, and performing solid-liquid separation to obtain phase conversion slag and phase conversion liquid; and carrying out acid leaching treatment on the phase inversion slag, and then carrying out solid-liquid separation to obtain leachate and leaching slag. The bismuth extraction method can realize selective leaching ofbismuth, reduce the purification burden of impurity elements such as iron, lead, silicon and the like in leaching solution, and simplify the process flow of recovering bismuth products such as subsequent neutralization hydrolysis, electrodeposition.

The invention relates to a method for preparing a manganese sulfate electrolyte by using high-iron and high-phosphor manganese ores. The method comprises the following steps of: separately ball-milling the high-iron and high-phosphor manganese ores and iron pyrites in a ball mill to form powders, mixing the powders in proportion and roasting in a self-manufactured roasting device, leaching the manganese ores subjected to sulfating roasting by taking water as a leaching agent to obtain a manganese sulfate solution, and removing impurities from the manganese sulfate solution to obtain a qualified manganese sulfate electrolyte. As the water is taken as the leaching agent in the method, the iron and phosphor can be effectively prevented from being leached while the extraction ratio of manganese is increased, the impurities are prevented from entering the solution, so that the quality of subsequent products is improved, the burden of purifying the manganese sulfate solution in subsequent operations is greatly alleviated, and the quality of the manganese sulfate solution is improved; and the method has the advantages of solving the problem that manganese sulfate solution production enterprises depend on scarce manganese carbonate ores, greatly reducing the pollution to the environment while reducing the production cost; therefore, the method is suitable for development and application of low-grade high-iron and high-phosphor manganese ores.

The present invention provides a process for producing 5-iodo-2-methylbenzoic acid by iodizing 2-methylbenzoic acid, which comprises, as essential steps, a reaction step in which 2-methylbenzoic acid is iodized in the presence of a microporous compound, iodine, an oxidizing agent, and acetic anhydride and a purification step in which sublimation, distillation, crystallization, or a combination of two or more of these is conducted. By the process, 5-iodo-2-methylbenzoic acid, which is useful in functional chemicals such as medicines, can be easily obtained as a high-purity compound in a high yield. The production steps comprising reaction and separation / purification are simple from the standpoint of process operation and the purification load is small. Furthermore, the microporous compound, e.g., a zeolite catalyst, separated and recovered from the liquid resulting from the reaction can be repeatedly used after a simple treatment. Consequently, the catalyst has a long life and the target compound can be produced by the efficient process.

The invention discloses a production method of furfural with high purification rate, which comprises: pulverizing biomass, mixing with acid, and sending to a hydrolysis kettle for hydrolysis; leading furfural gas produced after the hydrolysis to water for washing and purification; sending the purified furfural gas to fore-running and rectifying procedures so as to obtain the finished furfural. The invention also discloses a special apparatus for producing furfural, which comprises a pulverizer, an acid mixer, a material feeder, a hydrolysis kettle, a fore-running tower, a rectifying tower anda boiler, wherein the boiler, the hydrolysis kettle, the fore-running tower and the rectifying tower are sequentially connected, and a washing tank is arranged between the hydrolysis kettle and the fore-running tower. The removal rate of solid impurities in furfural gas after the hydrolysis reaches above 99%, the impurity removal process does not need electric power consumption, and the energy saving effect is obvious. After popularization, the production method and the special apparatus have favorable economic and social benefits, and meet the requirements for the strategy of sustainable development.

The invention relates to a method for preparing electrolytic manganese metal by using high-iron and high-phosphor manganese ores. The method comprises the following steps of: respectively carrying out ball-milling on high-iron and high-phosphor manganese ores and iron pyrites to form powders, mixing the powders in proportion and roasting in a self-manufactured roasting device, leaching the mixture subjected to sulfating roasting by taking water as a leaching agent to obtain a manganese sulfate solution, removing impurities from the manganese sulfate solution to obtain a manganese sulfate electrolyte, adding an electrolysis additive to the manganese sulfate electrolyte, simultaneously adding ammonium salt serving as a buffering agent to the solution, putting the electrolyte into an electrolytic cell, switching on direct current and maintaining constant temperature so that an electroextraction effect is generated to separate out the manganese metal on a cathode, purifying, washing, drying and peeling the separated manganese metal, thus obtaining the electrolytic manganese metal product. The method is short in technological process, hardly pollutes the environment and and is suitable for development and application of low-grade high-iron and high-phosphor manganese ores.

The invention discloses energy-saving and environment-friendly waste incineration flue gas treatment equipment, which comprises a settling tower and a filtering tower, wherein the settling tower comprises a first shell and a spraying mechanism, a first air inlet and a first air outlet are formed in the first shell, the spraying mechanism is installed in the settling tower, the spraying mechanism comprises a spraying pipe and a flow guide disc, the water outlet of the spraying pipe is arranged opposite to the flow guide disc, the edge of the flow guide disc abuts against the inner wall face ofthe first shell, the filtering tower comprises a second shell and a filter cartridge mounted in the second shell, a second air inlet and a second air outlet are formed in the second shell, and the first air outlet is communicated with the second air inlet. According to the invention, waste incineration flue gas is firstly subjected to sedimentation purification treatment through a settling tower and then subjected to secondary purification through a filter cartridge, so that the waste incineration flue gas is fully purified, the purification effect of the waste incineration flue gas treatmentequipment is improved, the purification burden of the filter cartridge is reduced, the filtration cost is reduced, the purification efficiency is improved, and the purposes of energy conservation andenvironmental protection are achieved.

The invention relates to a method for producing electrolytic manganese metal. The method comprises the following steps: respectively ball-milling high-phosphorus high-iron manganese ore and iron pyrite into powder, and mixing the powder according to a proportion for sulfating roasting; leaching the mixture treated by means of sulfating roasting with water as a leaching agent to obtain manganese sulfate solution; removing impurities from the manganese sulfate solution to obtain manganese sulfate electrolyte; adding an electrolysis additive into the manganese sulfate electrolyte, and simultaneously adding an ammonium salt as a buffering agent into the solution; putting the electrolyte into an electrolytic cell, providing direct current and keeping the temperature constant to play an electrochromatography effect so as to separate out manganese metal on a cathode; passivating, water-washing, drying and removing the manganese metal that is separated out, and thus obtaining an electrolytic manganese metal product. The method disclosed by the invention has a short technological process, low energy consumption and small environmental pollution, so the method is suitable for development and application of high-iron high-phosphorus lean manganese ores and the like.

The invention relates to the technical field of ecological peanut fertilizers, and provides a nitrogen-reducing and yield-increasing molasses ecological peanut fertilizer. The fertilizer contains the following components: 25-45 parts of urea, 10-30 parts of ammonium sulfate, 15-40 parts of monoammonium phosphate, 20-40 parts of potassium chloride, 0.1-0.6 part of zinc sulfate monohydrate, 0.5-1.2 parts of borax and 150-250 parts of cane molasses alcohol waste liquid. The fertilizer overcomes the defects in the prior art, is reasonable in design and compact in structure, and solves the problems that an existing peanut fertilizer is single in effect and cannot provide enough nutrients for peanut growth. According to the invention, cane molasses alcohol waste liquid is taken as a carrier, large and medium trace elements with proper proportion are added according to nutritional characteristics of peanuts in southern China and soil conditions, and the formula is long-acting; the cane molasses alcohol waste liquid is rich in various amino acids, proteins and polyglutamic acid, and the fertilizer can play a role in preserving moisture and fertility when being applied to soil. The great improvement and promotion effect and the ecological effect are achieved on southern peanut planting.

The invention discloses an ecological cycle high-efficiency tail water treatment method. The method comprises the following steps: step 1, pre-treatment; step 2, airing the pond and feeding water; step 3, treating pond management; step 4, adding algae seedlings; 5, adjusting water quality; step 6, supplementing algae species; 7, circulating water supply; according to the method, the growth of moss is effectively inhibited by adding quick lime and bleaching powder, so that the purification burden of tail water treatment is reduced, and the improvement of the organic environment in the tail water treatment pond and the promotion of the growth of algae and herbaceous plants are facilitated by adding and supplementing rotted leaves to the bottom of the tail water treatment pond, so that the biological purification effect of the biological wetland is guaranteed; by regularly adding a compound additive composed of various fungi into the tail water treatment pond, decomposition of organic matters in a water body in a culture land is facilitated, the balance of bacteria and algae in the water body is guaranteed, and generation of harmful disease sources in the water body is inhibited, so that the water quality in the culture land is improved, and the quality of aquaculture is guaranteed.

The invention discloses a dust purification device, which comprises a housing, an air inlet arranged outside the housing, a U-shaped passage connected with the air inlet, a rain shower device arranged in the U-shaped passage, a The air purification plate above the shower device, the exhaust channel located on the filter plate, the air outlet located on the exhaust channel, the exhaust fan located on the air outlet, and the left side of the U-shaped channel A water storage tank, a water supply device located in the water storage tank, and a filter device located at the bottom of the housing; the deluge device includes a rotating disk arranged on a U-shaped channel, a deluge plate arranged on the rotating disk and a fixed The roller, the torsion spring connecting the deluge board and the rotating disc; the said revolving disc is two, respectively rotatably embedded in the shell; There is a slot on the right side.

The invention discloses a filter type anti-vacuum oil mist absorbing cover. The technical scheme mainly includes that a reasonable annular cavity is formed between a lower packing seal cover and an upper packing seal cover, and a segmented filter is mounted in the reasonable annular cavity via a plurality of L-shaped support frames, an upper-layer segmented compression ring, a lower-layer segmented compression ring, fixing bolts and support frame bolts; a U-shaped oil return pipe is mounted in two symmetrical oil return screw holes on the inner side of the segmented filter, and oil mist absorbing pipes are arranged on oil mist absorbing holes on two sides of the lower packing seal cover; and a segmented flow guide cover is fixed onto the upper packing seal cover, a segmented flexible sealing body is arranged at the upper end of the segmented flow guide cover, a plurality of layers of segmented retaining collars are mounted on the inner side of the segmented flow guide cover, and the segmented flow guide cover is concentric with a spindle. According to the technical scheme, the filter type anti-vacuum oil mist absorbing cover can be widely applied to the field of hydroelectric power generation.

The invention discloses a method for preparing straw hemicellulose. The method comprises the following steps: (1) taking straws, crushing, adding the straws into an extraction container, vacuumizing the extraction container so as to press alkaline liquor into the extraction container, maintaining the vacuum degree, uniformly mixing the straws and alkaline liquor, restoring the normal pressure, and extracting the straws, wherein the solid-to-liquid ratio of the straws to alkaline liquor is 1g to (3-4mL); (2) washing the materials after the extraction operation is ended, thereby obtaining alkali-containing hemicellulose extracting solution and residues respectively; and (3) performing ultrafiltration on the obtained alkali-containing hemicellulose extracting solution until the concentration of the hemicellulose in the trapped fluid is more than or equal to 150g / L, collecting the trapped fluid when the conductivity of the trapped fluid is less than or equal to 100mu s / cm, drying, thereby obtaining the hemicellulose product. According to the method disclosed by the invention, high extraction rate can be obtained in short time and under the small solid-to-liquid ratio, the amount of alkali is saved, the target product concentration is improved, and the subsequent purification burden is alleviated.

The invention relates to the technical field of ecological corn fertilizers, and provides a water and fertilizer retention molasses ecological corn fertilizer, which comprises the following components of 25-45 parts of urea, 10-30 parts of ammonium sulfate, 15-40 parts of monoammonium phosphate, 20-40 parts of potassium chloride, 0.1-0.6 part of zinc sulfate monohydrate, 0.5-1.2 parts of borax, and 150-250 parts of cane molasses alcohol waste liquid. The corn fertilizer overcomes the defects in the prior art, is reasonable in design and compact in structure, solves the problems that an existing corn fertilizer is single in fertilizer benefit and not diversified, takes the cane molasses alcohol waste liquid as a carrier, is added with large, medium and trace elements in a proper proportion according to the nutritional characteristics of corn in southwest China and soil conditions, has a long-acting formula; according to thelong-acting professional corn fertilizer made by spraying and granulating, the cane molasses alcohol waste liquid is rich in various amino acids, proteins and polyglutamic acid, bacillus natto is added into the cane molasses alcohol waste liquid for fermentation to generate a proper amount of polyglutamic acid, and the fertilizer can play a role in water and fertilizer retention when applied to soil; and the great improvement and promotion effect and the ecological effect are achieved on drought planting of the corn in the south.

The invention discloses a steam purification and recovery device. According to the technical scheme, the steam purification and recovery device is characterized by comprising a barrel; an air inlet hole, an air outlet hole and a pollution discharge hole are formed in the barrel; and a coarse purification assembly and a fine purification assembly are arranged in the barrel. The coarse purification assembly comprises two limiting plates and a silk screen layer, the two limiting plates are arranged in a spaced mode and fixed to the inner side wall of the barrel; a plurality of vent holes allowing high-temperature steam to pass through are formed in the limiting plates correspondingly; and the silk screen layer is limited between the two limiting plates. The fine purification assembly comprises a filter element fixing plate and a plurality of filter element pipes, wherein the filter element fixing plate is used for fixing the filter element pipes and dividing the interior of the barrel into two parts which can only be communicated through the filter element pipes; and the ends, close to the coarse purification assembly, of the filter element pipes are closed, and openings are formed in the other ends of the filter element pipes. The device can purify high-temperature steam mixed with impurities, and is high in purification efficiency, good in purification effect and low in filter element maintenance cost.

The invention discloses an excrement solid-liquid separation and drying integrated device, and relates to the technical field of sewage treatment devices matched with toilets or urinals. The technicaldefect that an existing closestool or urinal needs to be flushed with a large amount of clean water after being used is overcome. The device comprises a threaded sleeve, a threaded rod and a motor. An excrement feeding inlet is formed in the side wall of a feeding end of the thread sleeve, and a dry excrement outlet is formed in the discharging end of the thread sleeve; the threaded rod is arranged in the threaded sleeve, a spiral groove for guiding and squeezing excreta in the excrement feeding inlet and then discharging the excreta from a dry excrement discharging opening is formed in the outer side wall of the threaded rod; and the depth of the spiral groove is gradually decreased in the direction from the excrement feeding inlet to the dry excrement discharging opening; and the motoris fixedly connected with one end of the threaded sleeve, and one end of the threaded rod is in transmission connection with the motor. By means of a squeezing mechanism composed of the threaded sleeve and the threaded rod, solid-liquid separation is rapidly conducted on sewage containing excrement after a closestool or a urinal is flushed, the subsequent purification burden is relieved, the service life of a rear filtering device is prolonged, the maintenance frequency is reduced, and subsequent water resource recycling is facilitated.