45results about How to "Reduce investment in environmental protection" patented technology

The invention relates to an energy-saving and high-efficiency rare earth ore concentrate sulfuric acid stepped roasting method, and belongs to the technical field of wet metallurgy and thermometallurgy. The energy-saving and high-efficiency rare earth ore concentrate sulfuric acid stepped roasting method comprises the following steps: mixing rare earth ore concentrate with sulfuric acid with the mass concentration of more than or equal to 92.5% according to weight ratio of 1 : (1.0-1.3); pelletizing, and charging particles into a first-section roasting kiln to roast, so that fluorine ions and water in the rare earth ore concentrate are completely volatilized; condensing the gasified fluorine ions and water, recovering hydrofluoric acid, roasting defluorinated dry ore particles, and charging the roasted particles into a second-section roasting kiln to separate; washing and absorbing separated sulfuric acid gas during roasting, recovering sulfuric acid, and directly leaching roasted ores to obtain a sulfuric acid rare earth solution. According to the energy-saving and high-efficiency rare earth ore concentrate sulfuric acid stepped roasting method, after the stepped roasting process is utilized, waste gas generated in pelletizing step is water vapor and can be directly discharged; compared with the prior art, the stepped roasting method has the advantages that a waste gas washing and absorbing system is reduced to more than 70% and the environmental protection input is reduced to more than 80%.

The invention relates to a preparation method for 4-(beta-sulfatoethyl sulfone sulfonyl) aniline, and relates to a preparation method for a sulfuric ester. The invention solves the problems that chlorosulfonic acid is greatly overused and environmental protection cost is high in the preparation process of para-ester at present. The preparation method of the invention comprises: condensing nitro halogeno benzene and beta-mercaptoethanol to produce 4-(beta-sulfatoethyl sulfone sulfide) nitrobenzene, adding hydrogen peroxide in aqueous medium after separating out dissolvent, water and salts to produce 4-nitrobenz-beta-hydroxyethyl sulfone by catalytic oxidation, deoxidizing nitro of 4-nitrobenz-beta-hydroxyethyl sulfone to be amino by catalytic hydrogenation reaction, and homogeneously esterifying with sulfuric acid to obtain the product. The method does not use chlorosulfonic acid, generation amount of waste waters is little and easy to treat, by-product is few and easy to separate. The purity of the product is high, the amino number and ester number are higher than 97. 0and 95. 0respectively, the difference between the two number is less than 2, and the product has light color and pure tint.

The invention provides an inter-provincial power purchase plan arrangement method taking regard of energy saving and emission reduction. The method comprises steps that I, a multi-target power purchase model comprehensively taking regard of the least total power purchase cost, the least total energy consumption of a thermal power set, the least SO2 emissions and the least CO2 emissions is established; II, single-target power purchase models respectively taking regard of the least total power purchase cost, the least total energy consumption of the thermal power set, the least SO2 emissions andthe least CO2 emissions are established and solved; III, dimensionless processing is carried out based on the four indexes; IV, a weighted value of each index is determined according to actual conditions; and V, the index values after dimensionless processing and the respective weighted value are utilized to establish a target function, a multi-target optimization problem is converted into a single-target optimization problem, the particle swarm optimization algorithm is further utilized for solution, and an inter-provincial power purchase plan taking regard of energy saving and emission reduction is made. The method is advantaged in that for the made inter-provincial power purchase plan, energy consumption of the thermal power set and pollution gas emission are reduced on the condition that the power purchase cost can be reduced.

The invention discloses a method of co-producing methyl benzoic acid, methylbenzoyl chloride and phthaloyl dichloride. The method comprises the following steps: (1) continuously introducing xylene, acatalyst and oxygen-containing gas into an oxidizing reactor to react to obtain an oxidized reaction solution; (2) rectifying and separating the oxidized reaction solution to obtain a low-boiling-point component and an initial evaporative tower bottom; (3) rectifying the initial evaporative tower bottom to obtain a methyl benzoic acid product and a tower bottom; (4) carrying out an acylating chlorination reaction on the tower bottom and an acylating chlorination reagent to obtain an acyl chloride reaction solution; and (5) rectifying and separating the acyl chloride reaction solution to separately obtain methylbenzoyl chloride and phthaloyl dichloride products. The method provided by the invention has the advantages of being simple in process, small in equipment investment, green and environment-friendly and good in comprehensive economical benefit.

The invention discloses a method for reducing waste residues of an N,N'-dicyclohexylcarbodiimide product. The method comprises the following steps: adding potassium carbonate or sodium carbonate intoa crude DCC product in a solvent-free state, controlling a temperature to be 100-120 DEG C, carrying out stirring for 1 hour, controlling a pressure to be less than -0.09 MPa, and performing distilling to obtain qualified DCC. Potassium carbonate or sodium carbonate is added to increase the pH value of a reaction system, and potassium carbonate and sodium carbonate do not react with the product, so the stability of N,N'-dicyclohexylcarbodiimide is facilitated, and the N,N'-dicyclohexylcarbodiimide is prevented from being decomposed at a high temperature; the amount of waste residues produced after DCC distillation can be reduced by 50% and is 1% or less of the mass of the crude DCC product, so environmental protection investment is greatly reduced; the method is simple and reliable to control, and production cost is reduced; and meanwhile, aspotassium carbonate or sodium carbonate is used as a catalyst, the product becomes transparent and colorless from light yellow, so the appearanceof the product is improved.

The invention discloses a blast furnace slag micro powder compound type vortex superfine separator which solves the technical problems of low production efficient, high energy consumption, serious air leakage and material collapse, low powder yield, low stability of specific surface area and the like of the field of micro powder separator relatively well by use of multiple innovative technologies such as vortex powder selection sealing, compound type superfine separation, micro powder cyclone separation, guide vane adjustment, snail-shaped direct air inlet, motor variable-frequency speed regulation and the like. The blast furnace slag micro powder compound type vortex superfine separator has the outstanding characteristics of simple structure, low price, high production efficiency, good powder selection quality, high powder yield and the like, is convenient to operate, avoids secondary pollution, is adapted to the technical transformation, equipment replacement and production capacity expansion, and improves the market demand of the product quality. The blast furnace slag superfine powder separated by the separator provided by the invention can replace cement clinker in a large proportion to be directly mixed in cement, and also can be used as fine powder component to be directly mixed in super-level concrete.

The invention relates to a method for promoting purity of N,N'-dicyclohexyl carbodiimide product. The method comprises the following steps: adding ammonium hydroxide into a DCC crude product containing solvent, controlling temperature at 0-50 DEG C, and stirring for washing; standing by for 1 hour after the ending of washing; cooling and performing suction filtration; reducing pressure and distilling, thereby acquiring high-purity DCC. Ammonium hydroxide is used for washing, so that the content of residual cyclohexyl isothiocyanate in DCC can be effectively reduced, the content of side-productcyclohexyl isothiocyanate in the product is controlled below 50ppm, the product purity is promoted and the purity is above 99.7%; a reaction system is optimized, ammonium hydroxide is used for washing and reaction occurs in a homogeneous reaction system, so that the reaction yield is increased, the DCC oxidizing yield is increased to 95% or above, and the reaction can be easily controlled; the yield is increased, so that the use ratio of raw materials is increased, the volume of wastes is reduced, investment in environmental protection is reduced and production cost is lowered.

The invention relates to a resistance measurement method for a transmission pull strip of a coke oven reversing machine and belongs to a coke oven process. The resistance measurement method comprises a first step of measuring deformation delta L of the transmission pull strip in a stressed state and a second step of calculating pulling force F of the transmission pull strip according to the equation that F=E*S*delta L/L, wherein E is elasticity modulus; S is the sectional area of the transmission pull strip; the unit is mm2; delta L is the deformation of the transmission pull strip in the stressed state; and L is an original length of the transmission pull strip. According to the resistance measurement method, faults of an exchange transmission system can be avoided. The resistance measurement method is simple to operate and easy to popularize, and only a ruler or a measuring tape is required.

The invention relates to a method for synthesizing N, N'-diisopropylcarbodiimide by using oxygen as an oxidant, which comprises the following steps: adding N, N'-diisopropylthiourea and a xylene solvent into a high-pressure reaction kettle in a mass ratio of 1-2:1; adding a MoO3 or Sb2O4 catalyst, wherein the use amount of the MoO3 or Sb2O4 catalyst is 1-3% of the amount of the added materials; introducing oxygen, wherein the mass ratio of the N, N'-diisopropylthiourea to the oxygen is 1:0.2-0.4, and an oxidation reaction is carried out for 3-4 h under the conditions that the pressure is controlled to be 5-10 MPa and the temperature is controlled to be 110-120 DEG C; and cooling to 5-15 DEG C, carrying out suction filtration, decolorizing, and carrying out reduced pressure distillation toobtain the DIC. Oxygen is used as an oxidizing agent, the reaction selectivity is high, the risk is low, meanwhile, the wastewater yield is greatly reduced, treatment is easy, and the problem that waste brine in a traditional process is large in amount and difficult to treat is solved; and the method is easy to control, the reaction yield is increased, and the production cost is reduced.

The invention relates to a powder coating for motorcycle hub coating. The powder coating is prepared from the following raw materials in percentage by mass: 65 to 75 percent of polyester resin, 4 to 6percent of a curing agent, 0.8 to 1.2 percent of a leveling agent, 0.3 to 0.8 percent of benzoin, 0.5 to 2 percent of a silane coupling agent, 5 to 15 percent of titanium dioxide, 0.1 to 0.5 percentof carbon black and 8 to 20 percent of a filler (barium sulfate), wherein the viscosity of the polyester resin is 4000 to 5000 mPa.s/200 degrees, the acid value is 27 to 33 mpa.s/200 degrees, the curing agent is triglycidyl isocyanurate, the leveling agent is an acrylic copolymer, and the molecular weight of the acrylic copolymer is 3000-4000. After the powder coating forms a paint film, the paintfilm has excellent properties such as high weather resistance, good leveling property, high gloss, and the like. The high-leveling and high-resistance powder coating is used for replacing three coatings (base powder, priming paint and finishing paint) of a traditional coating process, the coating process is simplified, energy is saved, the cost is reduced, waste water and waste gas are not generated, the environment-friendly property is greatly improved, and the environmental protection investment of enterprises is reduced.

The invention relates to the technical field of papermaking equipment and in particular provides a paper coloring device, which adopts a process of drying, then coloring and then drying products. Dual guide rollers are adopted to drive blankets and operate in opposite directions to enable paper to be clamped between the blankets, and a paper coloring process is completed by spraying onto the blankets through pump circulation. The paper is prevented from being deformed and ruptured and is kept in an original state, and the color can be freely adjusted. Then, excessive coloring dye is absorbed by using a vacuum pump, the color of the paper is enabled to be uniform and bright, the quality is good, the dye cost is low, the dye is enabled to be circulated in a coloring tank, can be collected and utilized and does not leak outside, and the pollution is precluded. The equipment cost is low, the operation is simple, the coloring speed is fast, the output is high, the situation that a great amount of wastewater is produced due to pollution caused by the dye is precluded, the sewage treatment expense is reduced, the safety performance is good, no potential hazard exists, and the device is very good novel, environmental-friendly, energy-saving equipment which benefits the nation and the people at present.

The invention discloses a cleaning device for a printed circuit board by using a lotion and a printed circuit board processing system. The cleaning device for the printed circuit board by using the lotion is arranged on a crown block, the cleaning device comprises a first motor, a first water suction module group, a first crossbeam, a first slide rail group; the first slide rail group comprises two strips of slide rails which are respectively installed on medial surface of two sides of the crown block, two ends of the first crossbeam are respectively slip connected with two strips of slide rails of the first slide rail group; the first water suction module group is arranged on the first crossbeam; when the printed circuit board suspended on a feiba of the crown block is hoisted from the lotion, the first motor drives the first crossbeam to slid on the first slide rail group, so that the first water suction module group is contacted with a first panel of the printed circuit board. The technical scheme of the invention is beneficially to the reduction of the lotion carrying-out amount of PCB during the process of lotion processing.

The invention belongs to the field of applications of metallurgical acid sewage heavy metal ion treatment technologies, and relates to an efficient centrifugal reactor, which comprises a shell (1), arotating barrel (3), a baffle (9), a motor (7), a mesh-like mixer (10) and the like, wherein the center of the shell is provided with the motor-driven rotating barrel, the bottom portion of the rotating barrel is provided with a liquid inlet hole (2), and the upper portion is provided with a plurality of liquid outlet holes. According to the present invention, the motor drives the rotating barrelto operate at a high speed, such that the acidic sewage containing heavy metal ions (such as copper, arsenic and the like) and the sodium sulfide solution are highly mixed so as to strengthen the conversion reaction and saving the sodium sulfide solution.