84results about How to "Low energy and material consumption" patented technology

The invention relates to a method for continuously effectively circularly extracting taraxacum rubber and synanthrin from dandelion taraxacumkok-saghyz. Taraxacum rubber belongs to a nonpolar substance, synanthrin belongs to a polar substance, and taraxacum rubber and synanthrin are obtained by extraction based on the water-oil separation principle employed by the method of the invention. The extract liquor of taraxacum rubber is subjected to steam distillation for separation of taraxacum rubber, and recycling and reusing of the solvent are realized. The extract liquor of synanthrin is subjected to a spray drying technology for obtaining of refined synanthrin. The final residual biomass residue is subjected to composting and is returned to the field, so that solid pollution is avoided and effective utilization of waste is realized. The method is characterized in that only one organic solvent is employed, and two products of taraxacum rubber and synanthrin are obtained during production. Taraxacum rubber and synanthrin split the cost mutually, and the product price is effectively reduced. The final composting and field returning of the residue help to realize resource utilization maximization. The whole technological process is circulatory, the extraction solvents are utilized circularly, energy consumption and material consumption are substantially decreased, and there are basically no discharged ''three wastes (waste gas, waste water and industrial residue)''.

The invention discloses a method for extracting phenolic substance from coal tar or direct coal liquefaction oil, wherein the method mainly includes several processes or steps: (1) applying extracting agent to extract phenolic substance from coal tar or direct coal liquefaction oil, wherein the extracting phase is dephenolized oil, and the extracting phase is the extracting agent enriched in phenolic substance; (2) applying the acidifying agent to acidify the extracting phase, and acquiring crude phenol oil and extracting agent rich in acidifying agent; (3) under the heating and/or depressurizing condition, performing the acidifying agent removal and extracting agent regeneration, circularly using the regenerated extracting agent, and circularly using the removed acidifying agent; (4) recycling a few amount of extracting agent in the dephenolized oil and crude phenol oil by water extraction, distillation and other regular method.

The invention discloses a preparation and purification method of paraphthaloyl chloride with a high purity, and belongs to the field of organic chemistry. The method comprises the following steps: carrying out a reflux reaction in the presence of a catalyst by taking terephthalic acid and thionyl chloride as raw materials, cooling and precipitating so as to obtain a crude product; filtering the crude product and then purifying the crude product in a melting crystallization or reduced pressure distillation manner; analyzing the contents of phthalic acid, thionyl chloride and catalyst in a filtrate; replenishing a proper amount of the terephthalic acid, thionyl chloride and catalyst according to the analysis result; then carrying out a circular reaction. Compared with the prior art, the method disclosed by the invention has the main advantage that the excess thionyl chloride does not need to be steamed out after the reaction is finished, but the crude product is obtained in a cooling and filtering manner, so that the filtrate is recycled. Thus, the consumption of energy and materials is decreased.

The invention relates to a gas phase polyethylene catalyst and a preparation method thereof. In the catalyst, anhydrous magnesium chloride and porous silica gel serve as a composite carrier, titanium-containing transition metal loaded on the composite carrier serves as an active component, an electron donor compound is added in the preparation process to serve as a modifier, and the electron donoris a silane compound with asymmetry. The problems that the common catalyst has low cavity, poor copolymerization ability and high product fine component content are solved, different silane electrondonor compounds are added in the preparation of the catalyst, polyethylene resin with different melt indexes is produced, in particular the gas phase polyethylene catalyst can be used for producing anethylene/1-hexene copolymerization new product with high additional value, so that the performance of the product is improved, the processibility of the resin is improved, and the application field of the product is widened.

The invention relates to an automatic control method of butadiene polymerization, which comprises the steps that: the reaction temperature is divided into six stages, when the temperature in a reactor changes, the actual value of the temperature and the set valve of the temperature have difference, and the output valve of a PID regulation action temperature regulator is taken as the set valve of a liquid ammonia regulator; the temperature of the reactor is controlled within the normal range; when the pressure exceeds the high limit valve, the set valve of the temperature regulator at this moment is stored into a register, and the set valve of the temperature regulator is endowed with lower valve again; the pressure in the reactor is reduced; when the liquid level of ammonia reaches to the high limit valve, the output valve of the ammonia regulator is manually set into a full-closed state until the liquid level of ammonia is lower than low limit valve, and temperature-liquid level cascade stage adjustment is changed back; and the data stored into the register is taken as the set valve of the temperature regulator again for automatic control. The automatic control method improves the quality of butadiene, leads the conversion rate to reach 91-92%, avoids the phenomena of implosion and surfusion, reduces the energy consumption and material consumption, and ensures a device to have stable operation.

The invention provides a method for carrying out nitrogen and phosphorus removal on municipal sewage municipal sewage. The method comprises the following steps: (1), carrying out anaerobic ammonia oxidation and phosphorus release treatment of short-cut denitrification phosphorus-accumulating bacteria on sewage in an anaerobic tank to obtain muddy water mixed liquor; (2), settling the obtained muddy water mixed liquor in a quick settling tank, firstly carrying out short-cut denitrification phosphorus-absorbing treatment on the obtained sludge, and then carrying out secondary settling in a secondary settling tank; firstly transferring the obtained liquid supernatant to a micro aerobic tank, carrying out oxidization treatment of ammonia nitrogen, then transferring to an anoxic tank, carrying out short-cut denitrification phosphorus-absorbing treatment, and finally carrying out secondary settling in the secondary settling tank; (3), refluxing nitrite mixed liquor produced by the micro aerobic tank to the anaerobic tank; (4), refluxing the sludge obtained by secondary settling to the anaerobic tank, wherein a liquid supernatant is the sludge obtained after nitrogen and phosphorus removal. The method disclosed by the invention can be used for not only realizing efficient nitrogen and phosphorus removal, but also greatly lowering energy consumption and material consumption in a sewage treatment process, and is especially suitable for treating low C/N (carbon/nitrogen) municipal sewage.

The invention relates to an intelligent soft measurement method of a slashing sizing percentage, and belongs to the technical field of automatic measurement. The method comprises steps as follows: according to composition analysis of a sizing mechanism and a slasher, auxiliary variables for soft measurement of the slashing sizing percentage are determined and comprise a slasher speed, pressure of a low-pressure sizing roller of the slasher, pressure of a high-pressure sizing roller of the slasher, concentration of size in a size box of the slasher and temperature of the size in the size box of the slasher; historical operating data of the slasher are collected, and a sample data set is established; a slashing sizing percentage soft measurement model is established, and a relation between the auxiliary variables and slashing sizing is obtained; and the slashing sizing percentage is calculated on line. According to the method, the slashing sizing percentage can be accurately calculated on line, the calculation speed and the accuracy are high, the online detection can be realized, and energy consumption and material consumption in the slashing production process can be reduced; the application range is wide, and online soft measurement of other quality indexes such as moisture regain, a elongation percentage and the like can be realized after a data source is appropriately modified; and the slashing production can conveniently share information with other links of cotton textile production, and references are provided for operations of other links.

The invention provides production equipment of hydrophilic moisture-conducting secondary plied porous fibers and a production method of porous fibers. In the production equipment of the hydrophilic moisture-conducting secondary plied porous fibers, a single-rod double-end two-way guider mainly features two-way guidance, so that the binding of the guider to tows is strengthened; the two tows, before being plied, are symmetrically deviated from the angular direction of the guider, the uniform tension of the two tows is ensured, the friction between the two tows before and after plying is reduced, fiber branching and breaking are avoided, and yarn drifting and broken ends are avoided, yarn skipping during winding switching is avoided, the problems, such as hairy fiber falling during cake winding, are avoided, and product quality is improved.

The invention provides a method for directly preparing mycophenolate sodium from mycophenolic acid fermentation broth. Soda is added into the mycophenolic acid fermentation broth, so that mycophenolate sodium liquor is produced, and after filtration and drying, mycophenolate sodium powder is prepared. The method directly prepares the mycophenolate sodium from the mycophenolic acid fermentation broth, the middle process in the preparation of the mycophenolate sodium powder is dispensed with, and organic solvent is not used, so that pollution is reduced and the production cost is saved, so the industrial production is facilitated.

The invention discloses a non-spangle friction-resisting hot dipping K-S-B zinc aluminum alloy and a machining process. The alloy comprises, by weight percent, 0.2 to 0.3% of K, 2.0to 2.5% of Mg, 1.0to 1.8% of Ca, 20.0 to 28.0% of Al, 0.2 to 0.3% of Se, 0.6 to 0.8% of In, 0.1 to 0.2% of B, 0.2 to 0.3% of S and the balance zinc. The hot dipping K-S-B zinc aluminum alloy and the process of the alloy solve the key problem in the hot-dip galvanizing aluminum alloy application research and industrialization, a final product has the excellent corrosion resistance property and the non-spangle surface state, and the material can be widely applied in the near future.

The invention relates to a magnesium modified chromium-based catalyst for vinyl polymerization and a preparation method of the magnesium modified chromium-based catalyst. The catalyst contains a chromium compound, a magnesium modified silica-gel carrier and an alkyl aluminum compound, wherein chromium accounts for 0.01wt%-5.0wt% of total mass of the catalyst, the magnesium modified silica-gel carrier accounts for 70.0wt%-99.9wt% of total mass of the catalyst, the mass ratio of silica gel to a magnesium compound in the carrier is 100-20:1, and aluminum accounts for 0.05wt%-25.0wt% of total massof the catalyst. When the catalyst is applied to industrial production of polyethylene, produced polyethylene particles are good in form, high in bulk density and wide in molecular weight distribution; the preparation method of the catalyst comprises steps as follows: a magnesium salt solution of tetrahydrofuran is taken as a dispersion medium, silica gel is taken as a carrier, the chromium compound is taken as an active component, an organo-aluminum compound is taken as a promoter, modification of carrier silica gel and loading of the active component are realized by spray drying, then drying, high-temperature activation, reduction, reactivation and re-reduction are performed, and the catalyst product is obtained; the technological process of the method is simple and convenient, no chromium-containing wastewater is produced, and industrial implementation is facilitated.

The invention provides a heat exchanger, which comprises a left collecting pipe, a right collecting pipe, a heat exchanging flat pipe and a shell body and forms an enclosed rectangle. Rows of heat exchanging flat pipes are staggered up and down in the rectangular shell; the plane of the heat exchanging flat pipe parallels the axial line of the collecting pipe; the left and right ports of the heat exchanging flat pipe are respectively welded on the left collecting pipe and the right collecting pipe; a baffle is arranged in the left collecting pipe and the right collecting pipe so as to form a sealed and end-to-end circulation channel between the left and right collecting pipes and the heat exchanger flat pipe, and the inside of the heat exchanger flat pipe is provided with a plurality of circulation channels; in addition, the bottom part of the shell body is provided with a fluid inlet and the upper part of the shell body is provided with a fluid outlet; an air inlet pipe and a fluid outlet pipe are communicated with the right collecting pipe or the right collecting pipe. As the invention adopts the heat exchanging flat pipe and the heat exchanging flat pipes are staggered, the heat exchanging effect of parallel flows is strengthened, the structure is quite compact and the heat exchanging efficiency is very high, thus well satisfying the fact that cooling or air-conditioning equipment requires small heat exchangers.