379 results about "Lithium bromide" patented technology

The invention relates to a stable silk fibroin liquid condensation body, gel and a preparation method and application thereof, and belongs to the technical field of silk fibroin. The preparation method comprises the following steps: S1, dissolving silk fibroin in a lithium bromide solution, and then adding trypsin for incubation to obtain an enzyme-digested silk fibroin solution; and S2, performing low-temperature programmed centrifugal treatment including an induction stage, a nucleation stage and a liquid-liquid phase separation stage on the enzyme-digested silk fibroin solution, and cleaning to obtain the stable silk fibroin liquid-state aggregate, the method can reduce aggregate liquid drop aggregation and improve the particle size uniformity of the liquid drops.

The invention provides a preparation method and application of lithium sulfide. The preparation method comprises the following steps: reacting a lithium source with a sulfur source; the lithium source is a solid lithium-containing substance with the purity of 99% or above and the whiteness of 86 or above; the solid lithium-containing substance is selected from one or more of anhydrous lithium hydroxide, lithium hydroxide monohydrate, lithium carbonate, lithium chloride, lithium bromide and lithium nitrate. According to the method, a solid lithium-containing substance with the purity of 99% or above and the whiteness of 86 or above is used as a lithium source and reacts with a sulfur source, and the ionic conductivity value of the Li6PS5Cl solid electrolyte prepared from the obtained lithium sulfide is stable. Experimental results show that the ionic conductivity can stably reach more than 2mS / cm.

The invention belongs to the technical field of solid-state batteries, and provides a lithium-sulfur-phosphorus-chlorine-bromine solid-state electrolyte, a preparation method thereof and an all-solid-state battery. The preparation method comprises the following steps: mixing lithium sulfide and phosphorus sulfide, and carrying out ball milling to obtain a lithium-sulfur-phosphorus ternary mixture; in protective gas, the lithium-sulfur-phosphorus ternary mixture, lithium chloride and lithium bromide are mixed and then subjected to ball milling, and a lithium-sulfur-phosphorus-chlorine-bromine mixture is obtained; and carrying out heat treatment on the lithium-sulfur-phosphorus-chlorine-bromine mixture in protective gas to obtain the lithium-sulfur-phosphorus-chlorine-bromine solid electrolyte. The lithium-sulfur-phosphorus-chlorine-bromine solid electrolyte provided by the invention not only improves the electrochemical stability, but also maintains the high ionic conductivity characteristic.

The invention relates to the field of biological medicine, in particular to IMSFs hydrogel, a ferroptosis induction system, a preparation method and application. The IMSFs hydrogel comprises a hydrogel body, and ferroferric oxide nanoparticles and sorafenib are loaded in the hydrogel body in a wrapping manner. The IMSFs hydrogel can be used as an injectable cascade ferroptosis anti-cancer drug. The preparation method of the IMSFs hydrogel comprises the following steps: firstly, preparing a silk fibroin-hyaluronic acid hydrogel body: dissolving silk hydrogel and hyaluronic acid in a lithium bromide solution; bDDE is added into the dissolved solution, and incubation is carried out; then dialyzing and washing with deionized water to obtain a silk fibroin-hyaluronic acid hydrogel body; and then loading the sorafenib nanoparticles and the ferroferric oxide nanoparticles into the silk fibroin-hyaluronic acid hydrogel body. The IMSFs hydrogel disclosed by the invention integrates magnetic thermal response and drug controlled release, and can be injected to a tumor site, so that the treatment effect on TNBC is remarkably improved.

The invention provides silk fibroin gel and a preparation method thereof, and relates to the field of biological medicines.The preparation method comprises the steps that 1, degummed silk or regenerated silk fibroin is dissolved in a lithium bromide solution, and a silk fibroin solution is obtained; (2) adding a cross-linking agent and sodium hyaluronate into the silk fibroin solution, uniformly mixing, and incubating to obtain silk fibroin gel; wherein the use amount of the sodium hyaluronate is 2%-14% of that of the degummed silk or the regenerated silk fibroin. The silk fibroin gel prepared by the invention is stable in mechanical property, can be stably stored for a long time, and has excellent biocompatibility and filling property.

The invention relates to 3D printing silk fibroin-based conductive hydrogel as well as a preparation method and application thereof, and belongs to the technical field of hydrogel. The preparation method comprises the following steps: S1, adding silk fibroin, a graphene oxide dispersion liquid and glycidyl methacrylate into a lithium bromide solution for reaction, and performing dialysis, centrifugation and freeze drying to obtain modified silk fibroin; s2, dissolving the modified silk fibroin, polyethylene glycol diacrylate and a photoinitiator in water, and centrifuging and defoaming to obtain bio-ink; s3, preparing the bio-ink into the 3D printing silk fibroin-based conductive hydrogel through a DLP 3D printing technology. Methacrylic acid silk fibroin is used as a base material, polyethylene glycol diacrylate is used as a reinforcing material, and graphene oxide is introduced to construct the photocuring printing ink. In addition, the silk fibroin-based conductive hydrogel with excellent performance can be prepared by combining the structural design of multilevel porous and triple-period extremely small curved surfaces.

The invention relates to the technical field of absorption type heat exchange and heat supply technologies, in particular to an intelligent large-temperature-difference absorption type heat exchange unit and a heat exchange method.The intelligent large-temperature-difference absorption type heat exchange unit comprises an I-type unit, an II-type unit and a control system.The I-type unit and the II-type unit each comprise a heat pump host, a generator, a condenser, an evaporator, an absorber, a heat exchanger and heat exchange liquid; the heat exchange liquid conducts cascade heat exchange in the generator, the condenser, the evaporator, the absorber and the heat exchanger, the heat exchange liquid comprises a lithium bromide solution and refrigerant water, the control system comprises a controller and a standby plate heat exchange module, and the two heat pump main machines are both in communication connection with the controller. The multi-stage evaporation and multi-stage absorption process is adopted, cascade heat exchange can be achieved, and the temperature difference of inlets and outlets of the I-type unit and the II-type unit is increased, so that the outlet temperature of the units is reduced, irreversible heat transfer loss in the units is reduced, and the efficiency of the units is improved.

The invention belongs to the field of electrochemistry, and discloses a self-growing solid electrolyte interface in an electrolysis process and application of the self-growing solid electrolyte interface in aniline production. The method comprises the following steps: dissolving nitrobenzene, 2-piperidone, lithium bromide and tris (N, N-tetramethylene) phosphamide in an organic solvent to obtain an electrolyte, and placing the electrolyte in a single-chamber electrolytic tank provided with an anode and a cathode for electrolysis, so that a solid electrolyte interface automatically grows on the cathode along with electrolysis and generates electrocatalytic activity. According to the method, hydrogen is not used, so that the risks of combustion and explosion are avoided; the device can be coupled with clean energy power generation, and is environment-friendly and sustainable; the device is simple, the size of the device is obviously reduced, and an exchange membrane does not need to be used for separating a cavity; a catalyst does not need to be loaded on an electrode, and the cost and technical difficulty of synthesizing and loading the catalyst are avoided; the price is low and operation is easy; the problems of inactivation and shedding of the catalyst do not need to be considered, and the long-term stability is good.

The invention relates to a composite bone repair material, a preparation method and application, the preparation method comprises the following steps: immersing silkworm cocoons in a soap salt solution for degumming, drying to prepare degummed silk, dissolving the degummed silk in a lithium bromide solution, dialyzing for desalting, and concentrating to obtain a regenerated silk protein solution; mixing the regenerated silk fibroin solution with a gelatin solution to obtain a gel solution; mechanically shaking the gel solution, so that the gel solution is uniformly mixed, uniformly distributed bubbles are formed in the gel solution, and a silk protein / gelatin gel block is obtained; soaking and cleaning the silk protein / gelatin gel block in an ammonium sulfate solution to obtain silk protein / gelatin cross-linked gel; and freeze-drying the fibroin / gelatin cross-linked gel to obtain the fibroin / gelatin composite material. The composite bone repair material has the advantages that the composite bone repair material has a bionic porous structure, has excellent mechanical properties and also has good biocompatibility and osteogenic activity. The material can be applied to filling and regeneration repair of skull defects of the orthopedics department, the oral cavity, the plastic surgery (maxillofacial) and the neurosurgery department, and has high industrial production and clinical application prospects.

The invention discloses a chloride ion battery for realizing bromine / chlorine synergistic chemistry and a preparation method thereof, and belongs to the technical field of redox batteries. The chloride ion battery takes graphite paper coated with vanadium pentoxide and graphite as a positive electrode, wherein the mass ratio of the vanadium pentoxide to the graphite is (0.5: 1)-(2: 1); zinc foil is used as a negative electrode, and an electrolyte is a mixed aqueous solution of tetramethylammonium chloride and lithium bromide. A double-halogen system of a V2O5-graphite composite positive electrode is adopted, chlorine species are chemically stabilized through the action of bromine, BrCl is generated in the charging process to inhibit Cl2 formation, and meanwhile, the intercalation energy barrier of chlorine is reduced; according to the salt-in-water electrolyte based on tetramethylammonium chloride, an electrochemical window is expanded to 3.0 V, and BrCl hydrolysis is effectively inhibited. The high-voltage halogen ion battery prepared by the method can realize a 2.3 V discharge platform, provides a specific capacity of 600mAh g <-1 >, has a capacity retention rate of 90% after 200 cycles, and opens up a safe development path for the high-voltage halogen ion battery without toxic gas emission. In addition, the battery system is simple in structure and has remarkable cost benefits.

The invention discloses an evaporation pressure reference controller for a lithium bromide absorption refrigeration system. The evaporation pressure reference controller comprises a pressure detection unit, a reference unit, a comparison unit and an execution unit. The pressure detection unit detects absolute pressure in the evaporator in real time; the reference unit provides a reference signal of the target evaporation pressure; the comparison unit outputs a pressure deviation signal; and the execution unit adjusts the circulation volume of the lithium bromide solution so as to approach to the solution circulation volume under the full-load design working condition of the system, and the adjustment benchmark is the full-load design working condition of the system. The evaporation pressure serves as an absolute physical reference, the solution circulation amount is dynamically adjusted, the system is made to adapt to the heat source load, the concentration automatically avoids the crystallization line, and the functions of load monitoring, crystallization early warning, energy efficiency calculation and the like are provided. And the device is suitable for various low-grade heat source scenes such as hot water, steam and flue gas, can be used for new machine manufacturing and stock transformation, and reduces the equipment size and the manufacturing cost.

An electric lithium bromide absorption air conditioning unit and an energy storage refrigeration and heating system, including an electric lithium bromide absorption air conditioning unit and an electric heat storage device; the electric lithium bromide absorption air refrigeration unit comprises an electric heat generator; the electric heat generator comprises an electric heating device and / or an heat storage and heat exchanging device, and a grid power supply; the electric heating storage device comprises a heat storing and exchanging tank; the electric heating device is connected to the grid power supply. The generator used is an electric heating-type heat generator. By utilizing lithium bromide, it disrupts the conventional refrigeration compression cycle air conditioning system to address the global warming issue. This system can also give rise to independent energy storage cooling or heating solutions for grid-side energy storage projects, helping to solve the energy storage issues on the grid user side.

The invention discloses an interface modification layer as well as a preparation method and application thereof. The interface modification layer comprises an electron barrier layer and a lithium-philic interlayer which are sequentially arranged on the surface of a solid electrolyte, the material of the electron blocking layer is selected from at least one of lithium oxyphosphorus nitride, lithium fluoride, lithium nitride, lithium chloride, lithium bromide, lithium iodide and lithium oxynitride, and the material of the lithium-loving interlayer is selected from at least one of germanium, silver, gallium, sodium, potassium, magnesium, aluminum, calcium, strontium, barium and titanium. The interface modification layer can prevent lithium nucleation induced by electron leakage in the solid electrolyte, reduce the risk of short circuit, reduce the interface impedance, improve the lithium ion flux uniformity and interface wettability, and improve the overall performance and cycle stability of the battery.

The invention discloses fireproof flame-retardant phenolic resin and a preparation method thereof, and relates to the technical field of high polymer materials. When the fireproof flame-retardant phenolic resin is prepared, firstly, alkali lignin is depolymerized in a lithium bromide solution, and depolymerized lignin is prepared; carrying out multi-component reaction on the depolymerized lignin, amino-terminated polydimethylsiloxane, isonitrile diethyl methylphosphate and glacial acetic acid to prepare modified lignin; the preparation method comprises the following steps: carrying out reaction modification on montmorillonite and diisocyanate to prepare isocyanate modified montmorillonite; the isocyanate modified montmorillonite and 3-aminopropyltriethoxysilane are subjected to a reaction, and modified montmorillonite is prepared; and polymerizing phenol with the modified lignin, paraformaldehyde and modified montmorillonite, and discharging to obtain the fireproof flame-retardant phenolic resin. The prepared fireproof flame-retardant phenolic resin has the advantages of flame retardance, good toughness, high strength and aging resistance.

The invention relates to the technical field of heating, in particular to a heating system based on waste heat recovery of a generator set, which comprises a waste heat collection unit comprising a plate heat exchanger and a cooling tower which are connected in parallel on a condenser circulating pipeline of the generator set, and a switching valve group is arranged between the plate heat exchanger and the cooling tower; the underground energy storage unit comprises a first mining and recharging well and a second mining and recharging well which are connected with the plate heat exchanger through a heat exchange pipeline, and the bottoms of the first mining and recharging well and the second mining and recharging well are thermally coupled through a high-heat-conduction filling layer; the heat pump unit comprises a lithium bromide absorption heat pump, and a low-temperature heat source inlet of the lithium bromide absorption heat pump is connected with an outlet of the plate heat exchanger and a water pumping pipeline of the first mining and recharging well in parallel. Compared with the prior art, the system has the advantages that the underground energy storage unit and the switching valve group are arranged to operate cooperatively and work cooperatively, heat supply safety is guaranteed, meanwhile, overground and underground integrated waste heat regulation, storage, release and control are achieved, and the stability, the regulation capacity and the energy comprehensive utilization efficiency of the system are improved.

The utility model discloses a split type multi-combined supply central air-conditioning system driven by solar energy, and belongs to the technical field of cooling and heating equipment. The system comprises a lithium bromide absorption refrigeration type host, a solar heat collector, a refrigeration water tank, a heating water tank, a plate heat exchanger, a fuel cell, a cooling tower, a wall-hanging stove and a fan pipe disc, wherein the lithium bromide absorption refrigeration type main machine absorbs heat energy provided by solar energy through lithium bromide, and the circulation process of refrigeration or heating is completed; water is heated by solar energy absorbed by the solar heat collector and fed into the heating water tank through a pipeline to be heated by the system. The plate heat exchanger is responsible for heat exchange between the lithium bromide absorption refrigeration host and the heating water tank; the fuel cell supplies power to the system, and the wall-hanging stove assists in heating the heating water tank. The cooling tower is used for dissipating heat of the lithium bromide absorption refrigeration host; cold water in the refrigeration water tank is dissipated into a room in an air mode through the fan pipe disc so that the system can conduct refrigeration.

The invention discloses a roof component based on evaporation and radiation collaborative cooling and preparation and construction thereof. The roof component breaks through the limitation of a single cooling mode through a multi-layer structure coupling evaporative cooling and radiation cooling technology. The reflective film specifically comprises a base layer, an evaporation radiation synergistic cooling material layer and a reflective protection layer. The synergistic material layer is formed by modifying polyacrylamide hydrogel through lithium bromide moisture absorption salt, titanium dioxide nanoparticles are embedded to improve the short-wave reflectivity and long-wave emissivity, and the synergistic material layer has the functions of radiation cooling and moisture absorption evaporation; the reflective protective layer is made of polyvinylidene fluoride-hexafluoropropylene copolymer, so that radiation cooling power is supplemented and pollution is prevented on the premise of moisture permeability; the heat entering a room is reduced by combining an evaporation radiation synergistic cooling material and a reflection protection material; by means of the roof component based on evaporation and radiation collaborative cooling, the limitation of cooling power can be broken through, the cooling effect is enhanced, and the purpose of building energy saving is achieved.

The utility model relates to the technical field of storage devices, in particular to a copper corrosion inhibitor storage device for a lithium bromide chilled water system, which performs position adjustment through an adjusting device, performs lifting adjustment through a lifting device and performs monitoring through the distance of a monitoring device relative to the storage device. The storage device is limited through the limiting device, and the copper corrosion inhibitor is stored through the storage device; comprising a console; the device further comprises an adjusting device, a lifting device, a monitoring device, a limiting device and a storage device, the adjusting device and the storage device are both installed on the operation table, and the lifting device, the monitoring device and the limiting device are all installed on the adjusting device. The adjusting device adjusts the position, the lifting device lifts, the monitoring device monitors the distance, the limiting device limits, and the storage device stores.

This invention relates to the field of liquid compressed carbon dioxide energy storage technology, specifically to a liquid compressed carbon dioxide energy storage system coupled with a high-temperature heat pump and a lithium bromide refrigeration unit. The system includes: a compressed carbon dioxide energy storage subsystem for storing and releasing electrical energy within the energy storage system; a high-temperature heat pump unit as an auxiliary energy storage device; a portion of the high-grade heat energy in a second heat storage tank being used by the lithium bromide refrigeration unit to generate cooling capacity during the energy release phase; another portion of the high-grade heat energy in the second heat storage tank being used by a hot water reheater to heat the stored hot water in the compressed carbon dioxide energy storage subsystem; and a lithium bromide refrigeration unit generating cooling capacity to liquefy low-pressure carbon dioxide in the compressed carbon dioxide energy storage subsystem and store the liquefied low-pressure carbon dioxide in a low-pressure carbon dioxide storage tank. By generating cooling energy through the aforementioned lithium bromide refrigeration unit, the liquefaction of low-pressure carbon dioxide in the compressed carbon dioxide energy storage subsystem is achieved, thereby solving the problem of large gas storage chamber volume in existing technologies.

The invention discloses an integrated energy supply system based on a gas engine waste smoke hydrogen energy storage system, which relates to the field of energy supply. The total amount of waste smoke of the gas engine is calculated, and the first amount of flue gas required by the chilled and hot water unit is calculated. When the total amount of waste smoke of the gas engine is less than or equal to the first amount of flue gas required by the chilled and hot water unit, all the flue gas is introduced into the lithium bromide absorption type chilled and hot water unit. If it is greater than the first amount of flue gas required by the lithium bromide absorption type chilled and hot water unit, the remaining flue gas is introduced into the waste smoke boiler to generate steam. The second amount of flue gas discharged from the hydrogenation reaction combustion furnace and entering the waste smoke boiler is determined, the total amount of flue gas entering the waste smoke boiler is calculated, the amount of natural gas raw material required is calculated according to the mass flow rate of steam and the total carbon flow rate in natural gas, and natural gas is introduced into the hydrogenation reaction combustion furnace according to the amount of natural gas raw material. The invention integrates the cold, heat and power cogeneration of natural gas reforming hydrogen production equipment, waste smoke boilers, gas engines, etc. and can be directly applied to building energy supply, and forms an effective recycling.

The application belongs to the technical field of hydrogen energy comprehensive utilization, and particularly discloses an electricity, cold and heat multi-combined supply comprehensive utilization system and method based on hydrogen energy, which comprises a hydrogen fuel cell system, a heat exchanger, a hydrogen internal combustion engine, a flue gas hot water type lithium bromide unit and a ground source heat pump system. Cooling water of the hydrogen fuel cell system cooling pipe network exchanges heat with first circulating medium of the heat system in the heat exchanger, high-temperature flue gas of the hydrogen internal combustion engine flue gas pipe network and cylinder jacket water of the cylinder jacket water pipe network exchange heat with the first circulating medium in the flue gas hot water type lithium bromide unit, and the second circulating medium of the cold system is cooled in the flue gas hot water type lithium bromide unit. The ground source heat pump system comprises a ground source heat pump unit, and is used for exchanging heat between low-temperature circulating water of the ground source heat pump rock-soil side and the first circulating medium. The application fully utilizes hydrogen energy, uses waste heat generated by hydrogen fuel cell and hydrogen internal combustion engine to generate electricity, heating and cooling, and realizes hydrogen energy cascade utilization.

The invention relates to a compressed air energy storage cold, heat and electricity multi-combined supply system and an energy storage and supply method thereof, the system comprises an energy storage unit, an energy release unit, a heat supply unit and a cold and steam supply unit, when the energy storage unit works, cold water of the heat supply unit is used for providing cold energy, and air is compressed into an oil and gas reservoir gas storage; meanwhile, hot water is provided for the heat supply unit, and the hot water returns to the cold water tank after supplying heat outwards in the radiator; when the energy release unit works, heat of high-temperature heat conduction oil of the cold and steam supply unit is used for outputting electric power outwards, and meanwhile low-temperature heat conduction oil returns to the low-temperature oil tank and is heated by the heat supply device to enter the high-temperature oil tank. Part of the high-temperature heat-conducting oil enters the oil-water heat exchanger to provide water vapor to the outside; meanwhile, heat is provided for the lithium bromide absorption refrigerating machine, and finally the lithium bromide absorption refrigerating machine supplies cold outwards; requirements of oil fields on cold, heat and electricity can be met, and comprehensive and efficient utilization of energy is realized.

The present invention belongs to the technical field of heat exchange equipment, and discloses a heat exchanger using a combined liquid dispersion device and an absorption unit to which the heat exchanger is applied. The absorption unit includes an absorber, a regenerator, an evaporator, and a condenser. The evaporator and the absorber are arranged vertically in the same cylinder body, and the condenser and the regenerator are arranged vertically in the same cylinder body. The absorber, the regenerator, and the evaporator adopt a heat exchanger structure of a combined liquid dispersion device of a liquid drip device and a liquid spray device, and the liquid is collected in a conical liquid collecting tank, so that problems such as liquid flooding of pipes and cavitation of the liquid delivery pump caused by liquid sloshing due to the inclination or sway of the unit can be avoided. The heat transfer tubes and the tube sheets adopt special materials and an expanding and welding processing technology, so that the liquid can be evenly distributed and dispersed under the inclined or swaying state of the marine lithium bromide absorption unit, and problems such as refrigerant pollution and seawater corrosion of the unit are solved, the stability of the unit operation is ensured, and the effective utilization of energy is realized.

The invention discloses a solid electrolyte and a preparation method thereof, a solid-state battery and electric equipment. The preparation method of the solid electrolyte comprises the following steps: S1, in an inert gas atmosphere, mixing lithium bromide, metal bromide and a solvent for reaction, and grinding after solid-liquid separation to obtain a precursor; s2, sequentially carrying out annealing I and annealing II on the precursor; an intermediate is obtained; and S3, mixing the intermediate and lithium halide, and carrying out ball milling to obtain the solid electrolyte, the temperature of annealing II is higher than that of annealing I; the annealing temperature of the annealing II is less than or equal to 400 DEG C. A self-adaptive interface layer with high ionic conductivity is generated in situ between the solid electrolyte and an electrode, and a primary gap between the electrode and the solid electrolyte and a new gap generated by lithium stripping are effectively filled, so that the defect of high impedance caused by poor interface contact is eliminated, the formation of lithium dendrites can be inhibited, and the service life of the lithium battery is prolonged. Further, the electrochemical performance of the solid-state battery is improved.

The utility model relates to a first-class lithium bromide absorption heat pump unit for preparing a high-temperature heat source. Comprising a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B, an internal circulation water pump, an internal circulation medium-temperature hot water system, pipelines, valves and the like, recycled low-temperature waste heat source heat is transferred to internal circulation medium-temperature hot water through the evaporator A and the absorber A. The internal circulation medium-temperature hot water enables the evaporation temperature of the evaporator B to be increased and the absorption pressure to be increased, so that the absorber B produces a high-temperature heat source. The generator and the condenser adopt independent cylinders, the pressure bearing capacity and the thermal displacement capacity of the unit are improved, the generating pressure and the condensing temperature are increased, and a high-temperature heat source can be produced. The unit expands the application field, realizes single-machine ultra-large type, reduces the total investment, and improves the comprehensive utilization rate of energy.

The invention belongs to the technical field of heating, and particularly relates to a heat exchange system and method for power plant low-temperature waste heat recovery heating, and the system comprises a power plant, a lithium bromide absorption heat pump unit and a shell-and-tube steam-water heat exchanger; through the lithium bromide absorption heat pump unit, heat exchange is conducted on heating return water and power plant steam, low-temperature waste heat of a power plant is recycled, and the heating return water is heated; heating return water exchanges heat with steam of a power plant through a shell-and-tube steam-water heat exchanger, and the heating return water is heated; heating return water and power plant steam are subjected to heat exchange through the lithium bromide absorption heat pump unit, low-temperature waste heat of the power plant is recycled, the heating return water is heated, then the heating return water and the power plant steam are subjected to heat exchange through the shell-and-tube steam-water heat exchanger, and the heating return water is heated again. The heating reliability and flexibility can be effectively improved, and the utilization rate of heating equipment is increased.

The invention discloses a system and method for comprehensive energy utilization of a thionyl chloride catalyst. The system comprises a thionyl chloride catalyst, a heat exchanger, a lithium bromide unit for cooling pure water, and a chilled water system. The outlet end of the thionyl chloride catalyst is connected to the heat exchanger via a pipeline, and gas with a certain amount of heat at the outlet of the thionyl chloride catalyst is directed into the heat exchanger. Pure water is provided in the heat exchanger for continuously passing through the heat exchanger to absorb heat in the gas. The output end of the heat exchanger is connected to the lithium bromide unit via a pipeline, and the output end of the lithium bromide unit is connected to the chilled water system. The invention overcomes the shortcomings of the prior art, recycles energy, reduces production costs, and significantly improves production efficiency. At the same time, the entire production process is optimized for reaction efficiency and material utilization, thereby increasing the economic benefits of the enterprise and having high social use value and application prospects.

The invention belongs to the field of optical cable sheaths, and particularly relates to a waterproof and fireproof protective sleeve material for an optical cable and a preparation method thereof. The waterproof and fireproof protective sleeve material for the optical cable comprises the following components in parts by weight: 100-120 parts of polyethylene resin, 15-20 parts of modified polyether polyol, 10-15 parts of a plasticizer, 3-5 parts of a stabilizer, 0.5-1 part of an antioxidant and 1-2 parts of a silane coupling agent, the preparation method of the modified polyether polyol comprises the following steps: taking polyether polyol, inorganic alkali carbonate and (+ / -)-BOC-A-phosphonoglycine trimethyl ester, heating to react, and treating to obtain the modified polyether polyol. The preparation process of the stabilizer comprises the following steps: taking epoxidized soybean oil, lithium bromide and magnesium perchlorate to react at normal temperature, and treating to obtain the stabilizer. According to the technical scheme, the mechanical property is greatly improved while the waterproof and fireproof performance is improved.

The application discloses a two-stage first-type lithium bromide absorption heat pump machine with two-stage evaporators connected at the bottom, which comprises a condenser, a secondary generator, a high-pressure stage secondary absorber, a high-pressure stage evaporator, a low-pressure stage secondary absorber, a low-pressure stage evaporator, a primary generator, a primary absorber, a primary heat exchanger, a secondary heat exchanger and pipelines arranged between the components. The main feature of the machine set is that the low-temperature waste heat source is divided into two sections, the high-temperature coolant water enters the high-pressure stage evaporator after flashing, then enters the high-pressure stage evaporator liquid tank, and the amount of coolant water used in the high-pressure stage evaporator and the low-pressure stage evaporator is automatically distributed through the coolant water connecting pipe. After being divided into sections, the concentration difference of the solution circulation is increased, the heat exchange temperature difference is increased, the heat exchange area is reduced, the material cost of the machine set is reduced, the equipment investment cost is reduced, the machine set is beautiful in appearance, compact in structure, high in performance coefficient, more waste heat can be recycled, and the comprehensive utilization rate of energy is improved.

The present application belongs to the technical field of energy saving and resource utilization in titanium dioxide production, and particularly relates to a method and system for heat energy utilization of a titanium dioxide gas-powder system. The method is aimed at the problems of waste of high-temperature tail gas heat energy of the gas-powder system and high energy consumption for cold preparation in the front production process, and adopts a two-stage cooling and heat energy recovery mode of "lithium bromide refrigerating unit + cooling device". The specific steps are as follows: introducing the clean high-temperature tail gas at 220-240 DEG C after dust removal into the lithium bromide refrigerating unit, driving the preparation of cold water or ice water by using the heat energy thereof, and directly supplying the front titanium liquid freezing crystallization process; then, the tail gas enters the secondary cooling device for deep cooling to below 70 DEG C for standard emission, while the circulating water is heated to hot water at 45-55 DEG C for reuse in the water washing process. The present application realizes "waste heat" preparation of "cold" and recovery of low-level heat energy through heat energy cascade utilization, the system heat recovery rate is greater than or equal to 92%, the power consumption of the lithium bromide unit is only 1 / 10 or less of the traditional refrigeration mode, and the production cost is significantly reduced.