117results about How to "Reduce removal costs" patented technology

The invention relates to a flue gas desulfurization and denitration purification recovery system, which comprises an oxidation absorption tower, a separation regeneration system and a concentration crystallization drying device, wherein the oxidation absorption tower comprises an oxidation tank, a flue gas inlet, a spraying filler layer, an atomization oxidation layer, a demister and a flue gas outlet. According to the present invention, flue gas enters the oxidation absorption tower from the flue gas inlet to carry out oxidation absorption on nitrogen oxides, sulfur oxides and heavy metals in the flue gas so as to form the absorption liquid, the purified flue gas is subjected to moisture removing through the demister and then is discharged from the flue gas outlet, anions of the absorption liquid are exchanged into the bed layer in the anion exchange equipment of the separation regeneration system, ammonia water is adopted to perform regeneration on the bed layer, the regenerated ammonium salt solution enters the concentration crystallization drying device, and crystallization drying is performed to form the composite ammonium fertilizer; and the nitrogen oxides, the sulfur oxides and the heavy metals in the flue gas can be removed in the integrated manner, such that the problems of ammonia escape and ammonium salt aerosol in the prior art can be avoided, and characteristics of simple equipment and product resource are provided.

The invention discloses a process for removing nitrite in aquaculture wastewater by immobilized nitrobacteria. The process comprises the preparation of nitrobacteria concentrated solution, the preparation of nitrobacteria immobilized particles, the activation of the nitrobacteria immobilized particles, the preparation of a nitrobacteria immobilized particle reaction packet and the removal of nitrite in the aquaculture wastewater by the reaction packet, wherein the preparation of the nitrobacteria immobilized particles comprises the steps that an aqueous mixture of polyvinyl alcohol, sodium alginate and silicon dioxide is heated and fully dissolved, and is evenly mixed so as to be made into embedding solution; when the embedding solution is cooled down to room temperature, embedding nitrobacteria concentrated solution is added in the embedding solution; after evenly mixed, the mixed solution is dripped into a crosslinking agent; the crosslinking agent consists of calcium chloride solution and saturated boric acid solution which are mixed according to the volume ratio of between 1 to 1 and 1 to 3; and finally, the immobilized particles are filtered out by a piece of gauze. The process has the advantages that nitrite has quick, continuous and stable degradation effect, and maintains high biological activity for a long time; moreover, the reaction packet can be used repeatedly and has the advantages of simple manufacturing method and low cost, thereby having enormous application prospect.

The elimination of iron scale on surface of stainless steel plate is completed with several shot blasting machines. The present invention features that SM150-type steel grits are filled into the material bin of the shot blasting machines and used in eliminating iron scale on surface of stainless steel plate. The present invention has sanding coefficient of 1.1-1.2, throwing head rotation speed of shot blasting machines of 1850-2000 rpm, annealing temperature of the hot rolled stainless steel plate of 1125-1140 deg.c, the brush roller pressure current in the pickling zone after elimination of 20-30 A, the washing water pressure not lower than 5Br and the technological speed of the hot rolled stainless steel plate of 60-67 m/min. Three shot blasting machines have separated thrown portions for high eliminating effect, and the present invention has low scale eliminating medium consumption, low cost and low surface roughness of the eliminated stainless steel plate.

The invention discloses a highly toxic waste water pre-treatment device and a use method thereof. The device comprises an active sludge adsorption unit and a coagulation absorption unit. In a use process, the active sludge adsorption unit removes COD (chemical oxygen demand) and partial heavy metal; the coagulation absorption unit removes most of the heavy metal. According to the practical use conditions, the installation and use sequence of the active sludge adsorption unit and the coagulation absorption unit can be freely arranged. The highly toxic waste water pre-treatment device disclosed by the invention has the advantages that heavy metal ions and the organic matter concentration of aromatic organic matters, phenol organic matters, ether organic matters and the like in industrial waste water can be greatly reduced; the total COD removal rate reaches 60 to 80 percent; the heavy metal removal rate reaches 80 percent; the beneficial conditions are provided for subsequent deep treatment of industrial waste water.

Substitute fluorocarbons (HCFC and HFC) for chlorofluorocarbons are replaced with a hydrocarbon refrigerant which is a natural refrigerant to render the elimination of chlorofluorocarbons with the hydrocarbon refrigerant as a natural refrigerant possible. Thus, the substitute fluorocarbons are diminished and energy saving in refrigerators or air conditioners is attained. A hydrocarbon mixture refrigerant is provided which contains propane and has a saturated vapor pressure at 7 DEG C of 0.3-1 MPa and a saturated vapor pressure at 35 DEG C of 0.6-2.2 MPa. It may further contain n-butane, isobutane, and ethane. The hydrocarbon mixture refrigerant preferably has a boiling point of -20 DEG C or lower.

The invention discloses an in-situ precipitation preparation method for a geopolymer fluorine removal agent. An alkali-activated geopolymer serves as a carrier, and metal ions are loaded onto geopolymer particles by adopting an in-situ precipitation method. The whole preparation process is simple in process and mild in conditions, no other additive is needed, a high-temperature calcining link is not needed, the preparative energy consumption is reduced, and the removal efficiency and production cost are taken into account. The experimental results show that the geopolymer fluorine removal agent prepared by in-situ precipitation has the characteristics of being uniform in coating, uniform in particle size, large in specific surface area, high in porosity, stable in mechanical property and the like, and direct packing is conveniently performed for conducting separating experiments; and the product has an excellent effect of adsorbing fluorine ions in water, the adsorbent failed after adsorption completion can be treated by utilizing a geopolymer curing mechanism, secondary pollution is avoided, and the product serving as a novel fluorine ion adsorbing material has wide prospects in the aspect of water treatment.

The invention discloses an ultralow-emission power generation system using low-calorific-value fuel for combustion. The ultralow-emission power generation system comprises a high temperature circulating fluidized bed boiler, a low temperature dust remover, a wet-process smoke desulphurization system and a wet type electric dust remover, wherein the high temperature circulating fluidized bed boiler comprises a controllable multi-stage air supply system, an ash staging cooling and discharging system, a low resistance air distribution device, a highly efficient cyclone separator, a deep denitration system and a strong smoke cooler and is small in N2O emission amount, and porous ashes are used for adsorbing SO3 and heavy metals; the ash concentration in the boiler and material grain size distribution can be adjusted through the ash staging cooling and discharging system when the low-calorific-value fuel for combustion is combusted so as to optimize combustion, heat transmission and flowing; the ultralow emission of NOx is realized through the controllable multi-stage air supply system and the deep denitration system; the ultralow emission of SO2 is realized by combining the wet-process smoke desulphurization system and calcium-injection desulfurization in the boiler; the ultralow emission of dust is realized through the lower temperature dust remover, the wet-process smoke desulphurization system and the wet type electric dust remover. According to the ultralow-emission generation system, the emission standards of thermal power plants and natural gas turbine generator units in key areas, the cost of pollutant removal is low and the environmental benefit is remarkable.

The invention provides a rapid removing method for protium in gas-containing a tritium hydrogen isotope. The rapid removing method sequentially comprises the following steps: a. carrying out leakage rate checking on a palladium retention method protium removing device, inflating He to realize the pressure being 1.5MPa and keeping the pressure for 60min; b. carrying out pre-treatment before purification; c. carrying out purification treatment; and d. carrying out post-treatment. By adopting the rapid removing method for the protium in the gas-containing the tritium hydrogen isotope, the low-protium gas-containing the tritium hydrogen isotope can be obtained.

The invention discloses a method for removing smell substances in water by using zero-valent iron to activate persulfate. The method utilizes the zero-valent iron to dissolve out ferrous ions in a reaction system, activates the persulfate to generate free sulfate radicals and degrades the smell substances in the water so as to achieve the purpose of removing the smell substances in the water. The method has the advantages that the smell substances with low concentration can be effectively removed under the condition of less addition amount, simultaneously the weakening of the removing effect due to excessive ferrous ions can be avoided; a better removing effect can be achieved under normal temperature, the pH application range is wide, the operation is simple, the method can be implemented without need of adding other equipment and can be used for removing the smell substances in the water.

The invention relates to a method for removing nitrate and nitrite during cucumber clear juice processing. The method comprises the following steps: crushing to prepare cucumber pulp, squeezing to prepare cucumber normal juice, carrying out enzymolysis and centrifugal treatment on the cucumber normal juice to obtain cucumber clear juice, adding active carbon in the cucumber clear juice to carry out stirring adsorption, carrying out ultrafiltration, heating to 45-50 DEG C, obtaining clarified cucumber clear juice through a resin adsorption column, and carrying out vacuum concentration, sterilization and filling on the cucumber clear juice to obtain the nitrate and nitrite removed cucumber clear juice. According to the method, macroporous resin is used for adsorbing the nitrate and nitrite in the cucumber juice during cucumber clear juice processing, so that the removal cost is low, the efficiency is high and the quality index of the domestic and export fruit and vegetable juice can be fully satisfied; meanwhile, the macroporous resin can be repeatedly used through elution, and the elution rate is up to above 90%.

The invention relates to the field of cleaning equipment, and discloses an adlet eliminating machine with a hollow planet carrier and a water flow route. Four spraying nozzle type brush heads, a pack basket type rack, three transmission hollow shafts, a planet carrier, a gear pair, the hollow planet carrier, a driving hollow shaft, a bearing block, two sealing bearings, a thru hole I, a thru hole II and a sealing water cavity are mainly included; the sealing water cavity is defined by the driving hollow shaft, the bearing block and the two sealing bearings, the bearing block is provided with the thru hole I, and the driving hollow shaft is provided with the thru hole II; the spraying nozzle type brush heads, the transmission hollow shaft, a hollow planet carrier center shaft, the driving hollow shaft and a main shaft motor output shaft are sequentially connected; and water passes through a water storage box, a water pipe, the thru hole I, the sealing water cavity, the thru hole II, the driving hollow shaft, the hollow planet carrier and the spraying nozzle type brush heads in sequence, and the three spraying nozzle type brush heads on the periphery can revolute and rotate. The adlet eliminating machine with a hollow planet carrier and the water flow route are novel in design, the water route system layout is reasonable and ingenious, the using rate of a detergent is improved, and the effect is good.

The invention provides preparation and application of a modified nano-hydroxyapatite adsorbing material. The coupling effect of a magnetic stirrer and ultrasound is utilized to ensure that hydroxyapatite can be completely integrated into nanometer titanium dioxide dispersion, by controlling the parameters such as water bath refluxing time, a drying temperature and the reaction pH, the rate of loading of nanometer titanium dioxide by nano-hydroxyapatite is increased, and then the novel adsorbing material capable of simultaneously adsorbing various heavy metal ions and with a high adsorption rate is obtained, so that adsorption and removal of the heavy metal ions in soil are realized.

The invention provides a protection structure of an expansive soil cutting slope and a construction method. The protection structure comprises a bottom protection structure, a middle protection structure and a top protection structure. The bottom protection structure sequentially comprises first waterproof geotechnical cloth, a foundation drainage cushion layer and a first reinforced layer from bottom to top; a seepage ditch is formed in the foundation drainage cushion layer; the middle protection structure sequentially comprises an internal drainage layer, a second reinforced layer and a slope cultivation soil layer from inside to outside; the internal drainage layer is connected with the foundation drainage cushion layer and can drain water to the foundation drainage cushion layer; the second reinforced layer is arranged on the first reinforced layer; the slope cultivation soil layer is located on a road surface; the top protection structure comprises second waterproof geotechnical cloth and a top protection layer; the second waterproof geotechnical cloth is arranged on the top of the middle protection structure; and the top protection layer is arranged on the second waterproof geotechnical cloth. The construction method is a method for constructing the protection structure. According to the protection structure of the expansive soil cutting slope and the construction method, the expansive soil slope can be effectively treated, and the stability of a slope base structure is maintained.

The invention discloses a method for treating ethyl nitrite in sodium azide synthesis tail gas and belongs to the technical field of tail gas treatment. The method comprises the step of leading ethyl nitrite air flow into an absorption liquid containing urea, hydrogen ions and nitrate. The method is low in cost, the reaction is mild, the concentration of ethyl nitrite in the tail gas can be greatly reduced, and the treatment efficiency is 99.1%. The method can effectively protect the environment and have very good economic benefits and social benefits.

The invention discloses a method for regulating the proportion of S/G type lignin and improving the degradation and conversion efficiency of cell walls by using laccase PtoLAC14, and belongs to the technical field of plant genetic engineering. The CDS sequence of the PtoLAC14 is shown as SEQ ID No. 1. It is discovered for the first time that the populus tomentosa PtoLAC14 can specifically regulateand control polymerization of G-type lignin monomers, and the PtoLAC14 is edited by using a CRISPR/Cas9 technology, so that transgenic plants with reduced total lignin content, reduced G-type lignincontent and increased lignin S/G ratio are obtained; the cell wall degradability of the transgenic plants is obviously improved, so that the removal cost of lignin during biological energy source production and papermaking is reduced. The invention lays a foundation for lignin genetic improvement and directed molecular breeding of plants, provides a new gene resource for plant genetic engineering,and has a wide application prospect.

The invention discloses a method for treating waste gas in ethyl nitrite production process, belonging to the technical field of environmental protection. The method comprises the following steps: introducing gas flow containing ethyl nitrite and nitric oxides into absorption liquid containing urea, hydrogen ions and nitrate for reacting. According to the method disclosed by the invention, the cost of treating the produced waste gas mixed with nitric oxides and ethyl nitrite during ethyl nitrite protection is low, the reaction is mild, the concentration of the ethyl nitrite in tail gas can be greatly reduced, the environment can be effectively protected, and the method has excellent economic benefits and social benefits.

The invention relates to a pile foundation dismounting method and an offshore foundation dismounting method. The offshore foundation dismounting method comprises the following steps that lifting ropesare connected to a guiding pipe frame, and the guiding pipe frame is cut; the lifting ropes are lifted, and the guiding pipe frame is removed; the outer sides of pile foundations are sleeved with enclosure sleeves; sea water and sediment between the enclosure sleeves and the pile foundations are removed; connecting bars are arranged between the enclosure sleeves and the pile foundations; the pilefoundations are cut, and thus to-be-removed pile bodies are obtained; and the to-be-removed pile bodies, or the enclosure sleeves or the connecting bar are lifted, and the to-be-removed pile bodies are lifted to the preset positions. During dismounting, the outer sides of the pile foundations are sleeved with the enclosure sleeves, each enclosure sleeve and the corresponding pile foundation are connected into a whole through arrangement of the connecting bars, thus after the pile foundations are cut, the cut to-be-removed pile bodies can be moved to the preset positions by hoisting the enclosure sleeves, or the connecting bars, and the pile foundations are dismounted. Using of a large lifting ship is avoided, the construction period is further shortened, and the removing cost is lowered.