72 results about "Freon" patented technology

The invention discloses an intelligent control method and system for latent heat defrosting, and particularly relates to the technical field of latent heat defrosting control. The method comprises the following steps that the defrosting starting time is accurately judged by establishing a multi-parameter environment sensing model, and carbon dioxide or Freon or air is selected as a heating medium; latent heat is input into the heat exchange area through the independent heating circulation path; the gravity direction of the heat exchange pipe is dynamically judged according to the platform posture, and the pipe section in the natural frost stripping direction is preferentially heated; an intermittent heating strategy based on thermal modeling is adopted to control energy consumption; when the energy is insufficient, heating is suspended, the state is recorded, and the energy is recovered for subsequent defrosting; according to the method, accurate judgment of defrosting starting, directional and efficient heating control and whole-process closed-loop management are achieved, the energy utilization efficiency, the frost layer stripping effect and the control reliability are remarkably improved, intelligence, self-adaption and restorability are achieved, and the method is suitable for meeting the requirement for stable defrosting in energy-limited and complex-environment scenes such as a high-altitude platform.

The invention relates to a semiconductor device manufacturing technology, and aims to provide a preparation method of refined coke powder and high-purity isostatic pressing graphite. The method comprises the following steps: by taking calcined petroleum coke or calcined pitch coke as a raw material, crushing and grinding to obtain primary coke powder, then carrying out high-temperature halogen impurity removal treatment in a continuous heating manner, and introducing Freon gas in the process; cooling to obtain impurity-removed coke powder; and carrying out dispersion, grinding, shaping treatment, airflow classification and magnetic separation to obtain refined coke powder. According to the method, the impurity content is greatly reduced from the raw material end, the situation that a large number of metal impurities generated during smashing and grinding treatment cannot be eliminated in the graphitization process due to the fact that the metal impurities are located below the surface layer of a blank can be avoided, and the internal impurity content of a final graphite product is smaller than 20 ppm; higher tap density can be obtained, and a better mixing and kneading effect is realized; the porosity of an isostatic pressing graphite product can be reduced, the microstructure of a graphite material is effectively improved, and the corrosion resistance of the graphite material is effectively improved.

The application belongs to the technical field of thermal insulation materials, and particularly relates to a novel thermal insulation material, a preparation method thereof and a cold plate. The novel thermal insulation material comprises the following raw material components: polystyrene particles 70-80 parts; methyl octabromo ether 5-7 parts; ethanol 0.5-1 part; freon 2-5 parts; and modified graphite powder 14-16 parts. The novel thermal insulation material has simple components, and after being prepared through compounding, the thermal conductivity coefficient is significantly reduced, and the novel thermal insulation material also has high strength and pressure resistance, fire resistance and water resistance. When the novel thermal insulation material is used for manufacturing a cold plate, the thickness can be greatly reduced under the same thermal insulation requirement, the space for use is saved, the self-weight is also reduced, and the novel thermal insulation material has a wide application prospect.

The utility model relates to the technical field of air conditioners, in particular to an intelligent air conditioner heat exchange device with an efficient heat recovery function. The utility model provides an intelligent air conditioner heat exchange device capable of efficiently recovering heat, which can absorb the heat of gaseous Freon through water circulation, prolong the retention time of the gaseous Freon, ensure that more heat is effectively taken away, and improve the heat recovery efficiency. An intelligent air conditioner heat exchange device with an efficient heat recovery function comprises a bottom frame, an outer cylinder and the like, and the outer cylinder is connected to the front portion of the bottom frame. According to the utility model, gaseous Freon enters the second isolation cylinder after passing through the first isolation cylinder at the right part and enters the left area of the outer cylinder after passing through the first isolation cylinder at the left part, and heat on the gaseous Freon is absorbed by water in the circulating water pipe; the effects that the staying time of the gaseous Freon can be prolonged while the heat of the gaseous Freon is absorbed through water circulation, it is ensured that more heat is effectively taken away, and the heat recovery efficiency is improved are achieved.

The invention discloses a Freon gas-liquid dual-purpose recycling device, and belongs to the technical field of Freon recycling, the Freon gas-liquid dual-purpose recycling device comprises a base, a gasification mechanism is fixedly connected to the surface of the base, a filtering mechanism is fixedly connected to the position, located on the rear side of the gasification mechanism, of the surface of the base, and a cooling device is fixedly connected to the front face of the gasification mechanism; a condensing mechanism is fixedly connected to the surface of the base, a drying mechanism is fixedly connected to the top of the condensing mechanism, a compressor is fixedly connected to the position, located between the gasifying mechanism and the condensing mechanism, of the surface of the base, and the compressor communicates with the gasifying mechanism and the drying mechanism through two connecting pipes correspondingly; liquid Freon is filtered through the filtering mechanism, the filtered liquid Freon enters the gasification mechanism and is gasified through the gasification mechanism, and meanwhile the interior of the gasification mechanism is cooled through the cooling equipment. On the basis of recycling the Freon, gas-liquid dual-purpose and process optimization can be carried out on the Freon, and meanwhile, the operation portability is improved.

The utility model relates to hydrogen fluoride production technical field discloses a pipeline descaling system for hydrogen fluoride production, include: evaporative cooling device has the accommodation cavity, fills with domestic water in the accommodation cavity, the cooling pipe inside fills with freon, first pipeline sets up the outside of evaporative cooling device, the import of first pipeline communicates with the below outside end surface of evaporative cooling device, and the export of first pipeline communicates with the outside end surface of the above of evaporative cooling device, first pipeline circulates domestic water through the drive part, and the parallelly connected setting of permanent magnet descaling device is in first pipeline, the utility model discloses through setting permanent magnet descaling device, utilizes the magnetic field effect, changes the scale layer crystallization form, makes it difficult to adhere to the pipe wall, the freon in cooling pipe can more efficiently carry out the cooling at this moment, and the heat exchange effect is high.

The invention discloses a cooling and heating integrated defrosting system, and relates to the technical field of cooling and heating combined systems, the cooling and heating integrated defrosting system comprises an evaporator, a compressor, an expansion valve and a condenser, an outlet of the compressor is respectively communicated with the evaporator and the condenser through a Freon main pipe, and a four-way valve is mounted on the Freon main pipe close to the compressor; an expansion valve is mounted on the Freon main pipe between the evaporator and the condenser; an inlet of the compressor is communicated with the liquid storage tank; a hot fluorine defrosting unit is mounted on the Freon main pipe between the compressor and the four-way valve, and is communicated with the liquid storage tank; two Freon passing pipes with different calibers are installed in the evaporator and the condenser, one Freon passing pipe with the large caliber is communicated with the Freon main pipe, and the other Freon passing pipe with the small caliber is communicated with the hot fluorine defrosting unit. According to the cold and hot integrated defrosting system, the comfort degree of indoor personnel can be greatly improved, and defrosting energy consumption is reduced.

This utility model discloses a heat pump circulating heating device for aquaculture, comprising: a heat exchange cylinder; and a heat exchange section, the heat exchange section being placed inside the heat exchange cylinder. The heat exchange section includes an internal support tube fixed inside the heat exchange cylinder. A spiral blade is installed between the outer side of the internal support tube and the inside of the heat exchange cylinder. The spiral blade, the internal support tube, and the heat exchange cylinder form a spiral heat exchange groove. The beneficial effects of this utility model are: by installing the spiral blade between the outer side of the internal support tube and the inside of the heat exchange cylinder to form a spiral heat exchange groove, high-temperature Freon can spirally move along the heat exchange groove inside the heat exchange cylinder, increasing the contact time between the high-temperature Freon and the heat exchange tube; multiple partition plates are fixedly and alternately in the middle of the spiral blade, which supports the heat exchange tube to ensure its stability while dividing the heat exchange groove into an S-shaped structure, further increasing the direct contact time between the heat exchange tube and the Freon, and improving the heat exchange effect.

The invention discloses a refrigeration-free vacuum cooling method based on double-threshold control. The refrigeration-free vacuum cooling method comprises the steps that the steam temperature # imgabs0 # and the pressure # imgabs1 # of an outlet of a vacuum cabin are monitored in real time; a temperature threshold value # imgabs2 # and a roots pump pressure threshold value # imgabs3 # are set; when # imgabs 4 # or # imgabs 5 # is met, the steam is directly communicated with the condenser through a bypass pipeline; when the requirements of # imgabs 6 # and # imgabs 7 # are met, steam is compressed through a roots pump and then enters a condenser; the condenser utilizes an environment cold source to dissipate heat, and condensed gas is discharged out of the system through the backing pump set. According to the invention, the equipment investment is saved, the use of a compression refrigeration system and Freon is omitted, the energy consumption of the system is greatly reduced, the cooling efficiency of the system is higher, and the equipment is more reliable.

The present application relates to the technical field of waste heat recycling, in particular to a method for converting industrial waste heat into low-pressure steam to drive ammonia adsorption refrigeration, comprising the following steps: Step 1: industrial waste heat collection and pretreatment, S1.1 waste heat classification collection: for different types of waste heat (slag waste heat, high-temperature flue gas, low-pressure steam, engine exhaust gas) in industrial production, special heat exchange devices are used for classification collection, wherein slag waste heat is recovered through indirect heat exchange devices; the present application efficiently recovers industrial low-grade waste heat and converts it into stable low-pressure steam of 0.3 MPa and above, and the waste heat utilization rate is increased to more than 85%; the refrigeration process does not consume high-grade energy, the main machine operates at zero cost, the comprehensive energy-saving rate is more than 77.8%, the annual electricity saving can reach 140,000 degrees per set, natural working substance ammonia is used as refrigerant, ammonia can be cyclically decomposed and compounded under natural conditions, and there is no greenhouse gas emission; fluorine-containing refrigerants such as freon are abandoned, atmospheric pollution is avoided from the source, and the green and low-carbon development trend is met.

The utility model relates to the field of freezing and cold storage equipment, and particularly discloses an evaporation and cold storage all-in-one machine special for large and medium-sized cold storages of a Freon system. The evaporation and cooling all-in-one machine comprises a condensing unit, an axial flow fan is mounted at the top of the condensing unit, a condensing coil is mounted in the condensing unit, and a unit side box body integrally assembled with the condensing unit is arranged on one side of the condensing unit, and is characterized in that the condensing unit is provided with an air inlet and a condensed water outlet on one side of the unit side box body; a gas-liquid separator, a screw compressor, an oil-water separator, a water pump, a high-pressure liquid reservoir and a control box are installed in the unit side box body, the gas-liquid separator, the screw compressor and the oil-water separator are sequentially communicated, a gas outlet of the oil-water separator is communicated with a gas inlet of the condensing unit, and a gas inlet of the oil-water separator is communicated with a gas return pipe installed on the unit side box body. The integrated unit is reasonable in structural design and suitable for modular prefabrication and installation, the unit, the condenser and other equipment are arranged in an integrated machine, the machine room building cost investment is reduced, and the construction period is shortened.

Systems and methods are provided for treating, degrading, and incinerating fluorocarbons or fluorinated materials, such as Freon ® with reduced gaseous perfluorinated compound (PFC) emissions. The methods include mixing a fluorinated material with a hydroxide base and optionally a solvent system (e.g., diglyme, polyether, polyether alcohol, polyethylene glycol selected from ethylene glycol and PEG 50 to PEG 3350, N-methyl pyrrolidine, dihydrolevogluton, and / or water ("solvent")) in a batch reactor to form a reaction mixture (also referred to as a suspension). The reaction mixture is heated to a temperature in the range of about 25 °C to about 400 °C for about 0.5 hours to about 240 hours to defluorinate the fluorinated material and produce a defluorinated waste product. More specifically, the methods convert organic fluorine present in the fluorinated material, such as Freon ® to inorganic fluorides. As a result, the defluorinated waste product can be incinerated with reduced harmful gaseous PFC emissions.

The utility model discloses a freon natural circulation cooling system for turbine, including evaporimeter, condenser, evaporimeter is linked with condenser, and evaporimeter is located below condenser, and evaporimeter is used for converting freon from liquid state into gaseous state, the condenser be used for converting freon gaseous state into liquid state, and the shell of condenser is equipped with first heat transfer structure, and the shell of evaporimeter is equipped with second heat transfer structure.

The utility model relates to the field of refrigerating systems, and discloses a Freon / carbon dioxide cascade skid unit which comprises a high-temperature system and a low-temperature system, and the high-temperature system comprises a Freon screw compressor unit skid and a U-Turn type gas-liquid separation condensation evaporation unit skid. The low-temperature system comprises a carbon dioxide piston compressor unit skid and a carbon dioxide barrel pump unit skid, the carbon dioxide piston compressor unit skid and the Freon screw compressor unit skid are arranged in parallel, the unit skid is divided into an upper layer and a lower layer, and a carbon dioxide piston compressor is located at the upper end of the Freon screw compressor. The U-Turn type gas-liquid separation condensation evaporation unit skid is arranged in the width direction of the upper-layer carbon dioxide piston compressor, and the carbon dioxide barrel pump unit skid is arranged at the position close to the tail end evaporator and arranged in the length direction of the Freon screw compressor.

The invention relates to the technical field of chlor-alkali industrial gas treatment, in particular to a chlorine liquefaction-gasification energy balance system and process based on water cooling circulation. According to the system, low-temperature cold water serves as a cooling agent, and the heat efficiency of the system is improved to 75% or above through the gradient liquefaction design of first-stage normal-temperature water cooling (20-30 DEG C) and second-stage low-temperature water cooling (14-19 DEG C) in cooperation with a waste heat recovery liquid chlorine gasifier. And compared with a traditional refrigeration process, energy is saved by more than 30%, Freon refrigerants are completely abandoned, and environmental protection and economic benefits are achieved. The equipment investment and maintenance cost is low, and the regional adaptability is high.

The invention relates to the technical field of freeze dryer regulation and control, in particular to an automatic freeze dryer regulation and control method based on alternate trapping and ice melting and a freeze dryer. The method comprises the following steps: analyzing the drying condition of Freon liquid in a drying stage of the trap, and determining the support strength of Freon gas generated by the trap after the drying stage to an ice melting stage; on the basis of the supporting force, analyzing the pressure influence on the interior of the coil pipe after the Freon gas in the coil pipe releases heat to melt ice, and determining the continuous necessity of the trap in the ice melting stage; analyzing temperature change differences among the traps at different positions, and correcting the continuous necessity to obtain a final continuous time length weight; and intelligently regulating and controlling the duration of the ice melting stage of the catcher according to the final duration weight. According to the invention, the freeze-drying efficiency of the freeze dryer is improved by regulating and controlling the duration of a single trap in the ice melting stage.

Provided is a production method for chlorotrifluoroethylene and trifluoroethylene, which does not use freon and uses inexpensive raw materials that are by-products of Ishikawa reagent, and which can easily produce the chlorotrifluoroethylene and trifluoroethylene. Provided is a production method for chlorotrifluoroethylene, which includes: (A3) a process A3 of decarboxylating 2,3,3,3-tetrafluoro-2-chloropropionic acid in an anhydrous state in the presence of a base to obtain the above-described chlorotrifluoroethylene; or (B3) a process B3 of chlorinating trifluoroethylene to obtain the above-described chlorotrifluoroethylene.

The utility model relates to the technical field of heat exchangers, in particular to an automatic oil discharge device of a cryogenic heat exchanger, which comprises an oil collecting tank connected with the heat exchanger, and the oil collecting tank is connected with a refrigerator; a first liquid level detector and a second liquid level detector are arranged on the oil collecting tank; after lubricating oil in the heat exchanger flows into the oil collecting tank, the oil quantity in the oil collecting tank is detected through the first liquid level detector and the second liquid level detector, it is ensured that the liquid level in the oil collecting tank is not reduced to zero, it is ensured that the liquid level in the oil collecting tank is not reduced to zero through detection of the liquid level, and the atmosphere and Freon are separated from each other through refrigerating machine oil. Therefore, the stability of the technological parameters of the Freon pipeline is ensured, and the normal work of the refrigerator is further ensured.

A medical energy-saving water chilling unit is integrally mounted outdoors and comprises a cold water return pipe, a water return pipe temperature sensor, an electric three-way valve, an electric control cabinet, a natural cooling coil system, a Freon refrigerating system, a water supply pipe temperature sensor, a water tank, a water supply pump, a cold water supply pipe and an outdoor air temperature sensor. The natural cooling coil system utilizes outdoor low-temperature air to directly exchange heat with cold water to realize natural cooling, and comprises a natural cooling water inlet pipeline, a natural cooling coil and a natural cooling water outlet pipeline. The mode of combining natural cooling and Freon refrigeration is adopted, when the outdoor air temperature is low in winter and transition seasons, outdoor low-temperature air is used for directly exchanging heat with cold water of the cold water return pipe, natural cooling is achieved, use of a compressor or reduction of the power of the compressor is avoided, the operation time and power consumption of the compressor are effectively reduced, and the energy consumption of the compressor is reduced. And the annual refrigeration energy efficiency of the water chilling unit is improved, so that energy is saved, and the operation cost is reduced.

This utility model relates to the field of sand cooling technology, specifically a vertical pipe sand cooling system using Freon refrigerant. It includes an installation plate with a cooling box fixedly mounted on it. Several sets of lower installation pipes are fixedly connected to the top of the cooling box, and several sets of cooling pipes are fixedly connected to the bottom of each lower installation pipe. A compressor is fixedly mounted on the top of the installation plate, and the compressor contains Freon refrigerant gas. By using Freon refrigerant circulation, combined with copper alloy cooling pipes that ensure full contact with the sand aggregate, the system solves the problem of low efficiency in traditional cold air cooling, significantly improving the cooling efficiency of the sand aggregate. An exhaust fan and heat dissipation fins enhance the condensation effect, while the central pipe accelerates refrigerant circulation, further optimizing cooling performance. A cylinder drives a baffle to quickly discharge materials, making operation convenient. Ultimately, it can efficiently control the temperature of the sand aggregate, ensuring that the concrete outlet temperature meets standards and avoiding quality problems such as cracks caused by high temperatures.

The utility model discloses a multi-mode collaborative heat dissipation array server liquid cooling cabinet heat dissipation system, which comprises two array server liquid cooling cabinets, two cooling capacity distribution units, two heat pipe air conditioner all-in-one machines and the like, and each heat pipe air conditioner all-in-one machine comprises a heat pipe natural cold source refrigeration loop and a compressor mechanical refrigeration loop. The two refrigerating circuits independently or jointly provide an outdoor cold source for the cooling capacity distribution unit, heat from the two server liquid cooling cabinets in rows is transmitted to the heat pipe air conditioner all-in-one machine in the cooling capacity distribution unit, and therefore the heat is transmitted out of a machine room. An outdoor cold source adopts the heat pipe air conditioner all-in-one machine combining a natural cold source and mechanical refrigeration, Freon refrigerants are provided for the primary side of the cooling capacity distribution unit, the system saves energy, and outdoor pipelines do not have the risk of frost cracking in winter; the secondary side of the cooling capacity distribution unit adopts cooling liquid to directly take out heat of the liquid cooling server and transfer the heat to the primary side, the heat exchange capacity is large, the heat exchange efficiency is high, and the PUE of the data center can be remarkably reduced.

The utility model relates to a fluoridation filtering device. The fluorination filtering device comprises a drying filter and a verification adsorber which are connected in sequence, the drying filter is detachably communicated and connected with the verification adsorber, so that Freon to be purified sequentially flows through the drying filter and the verification adsorber to realize drying and dehydration; a Freon inlet is formed in one end, far away from the verification adsorber, of the drying filter; a Freon outlet is formed in one end, far away from the drying filter, of the verification adsorber. According to the fluoridation filtering device, it is ensured that moisture of Freon is effectively absorbed through verification and double filtration, moisture is visually recognized from the source and directly prevented from entering a refrigerating machine, the operation efficiency and safety of the refrigerating machine are improved, and the service life of the refrigerating machine is prolonged.

The application discloses a kind of dryers for LNG filling station using cold energy, it relates to a kind of energy utilization technical field, including LNG storage tank, freon storage tank, heat exchange box, drying cylinder, vacuum machine and ice maker, the output of the LNG storage tank is connected together by liquid inlet pipe and the input of heat exchange box, while the input of the side of heat exchange box close to liquid inlet pipe is also equipped with air inlet pipe, the other end of air inlet pipe and the output of freon storage tank are connected together, wherein freon storage tank is filled with gas freon, wherein LNG and freon carry out cold exchange in heat exchange box, liquid-state freon after cold exchange is introduced into drying cylinder to refrigerate material, and vacuum drying is realized to material in drying cylinder by vacuum machine after refrigeration is completed, and water vapor in drying process is introduced into ice maker to refrigerate, ice maker is installed on the top of heat exchange box, lost cold energy is introduced into ice maker to utilize by fan, realize the full use of LNG cold energy, reduce energy waste.

The application discloses a kind of heat management system and vehicle, heat management system includes: fluorine pump, the fluorine pump is provided with liquid inlet and liquid outlet;Motor assembly, one end of the motor assembly is connected with the liquid outlet;Radiator, the radiator is provided with heat dissipation inlet and heat dissipation outlet, the heat dissipation inlet is connected with the other end of the motor assembly, and the heat dissipation outlet is connected with the liquid inlet.Fluorine pump replaces water pump and cools motor assembly, without traditional plate heat exchanger and other heat transfer processes in between, which can improve heat transfer efficiency.In addition, the refrigerant medium used by fluorine pump when cooling motor assembly is freon, and the refrigerant medium used by heat management system when refrigerating and heating is also freon, which can integrate fluorine pump into heat management system, improve the integration of heat management system, and reduce costs.In addition, fluorine pump does not need compressor to work when working, which can reduce energy consumption and noise, and improve the COP value of heat management system.

The utility model provides a floating type Freon heat exchanger oil return mechanism which comprises a floating block (4) which is arranged in an inner cavity of a Freon heat exchanger (1) and floats between Freon and oil, the floating block (4) is connected with one end of a suction hose (3), and the other end of the suction hose (3) extends out of the Freon heat exchanger (1). The oil suction device can adapt to various working conditions, as the floating block floats between an oil layer and Freon liquid, and the suction port is always located in the oil layer, the problem that the evaporation process is affected due to the fact that oil floats above Freon is avoided, the heat exchange efficiency is improved, and the service life of the oil suction device is prolonged. In addition, the design allows the guide rod, the floating block and the suction port to be taken out by dismounting the mounting bolts, so that the maintenance and early-stage mounting work is simplified, and the maintenance cost and time are reduced.

The utility model discloses a Freon refrigerating system for carbon dioxide purification, which comprises a compressor, a feed gas heat exchanger is arranged at the downstream of the compressor, an indoor Freon storage tank is arranged at the downstream of the feed gas heat exchanger, a first connector is arranged at the top of the indoor Freon storage tank, and a second connector is arranged at the bottom of the indoor Freon storage tank. A first connector and a second connector are arranged on the side portion of the indoor Freon storage tank, a second connector and a third connector are arranged on the side portion of the indoor Freon storage tank, an outlet of the compressor and the first connector are converged at a first convergence point, an evaporator condenser is arranged on the downstream portion of the first convergence point, and a siphon tank is arranged on the downstream portion of the evaporator condenser. According to the Freon refrigerating system for carbon dioxide purification, cooling capacity is provided for the carbon dioxide condenser and the dehydrating tower top condenser by means of latent heat generated after high-pressure liquid-phase Freon is subjected to pressure reduction and gasification, condensation latent heat is remarkably recycled, energy consumption, investment and water consumption of an evaporative condenser of the Freon refrigerating system are reduced, the efficiency of equipment and the system is improved, and energy conservation and emission reduction are achieved. Therefore, the energy consumption is reduced.

To provide a used chlorofluorocarbon regeneration apparatus that can perform necessary thermal management to distillate and regenerate used chlorofluorocarbon with a unit of heat pump free from any impact from ambient temperature.SOLUTION: A used chlorofluorocarbon regeneration apparatus includes: a high temperature chamber 3; a low temperature chamber 5; a heat pump 7; and heat exchange means 9 for exchanging heat with a refrigerant of the heat pump 7. The heat pump 7 includes a heater 71, a chiller 73, and a compressor 75. The heat exchange means 9 includes: at least one of the condenser and expander; and a heat exhauster / heat absorber.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of Freon recovery, in particular to a novel device for Freon recovery, which comprises a containing frame, a supporting plate is mounted on one side of the containing frame and used for mounting a fluorine collector, pulleys are mounted at the bottoms of the containing frame and the supporting plate, and a handle convenient for pushing the containing frame to move is arranged on the containing frame. The top of the containing frame is open, the interior of the containing frame is a cavity capable of containing the Freon recycling tank and cooling liquid, the fluorine recycling machine is communicated with the Freon recycling tank through a connecting hose, a supporting rod is arranged on the containing frame, a connecting pipe is arranged in the supporting rod, one end of the connecting pipe is communicated with an inner cavity in the lower portion of the containing frame, and the other end of the connecting pipe is communicated with the cooling liquid. The other end of the connecting pipe penetrates through the supporting rod and is connected with a nozzle. The cooling liquid is contained in the containing frame and sprayed to the surface of the upper portion of the Freon recovery tank through the connecting pipe and the spray head, the temperature in the tank is effectively reduced, the pressure is prevented from being too high, the service life of the tank body is prolonged, and the safety of Freon recovery is improved.

This invention provides a method for the oxidation reaction of Freon with oxygen in the air. The method includes: co-supporting palladium and cerium compounds on an Al₂O₃ or TiO₂ support, followed by calcination and hydrogen reduction to obtain a palladium-cerium bicomponent catalyst; loading the catalyst into a fixed-bed reactor, introducing a mixture of Freon and air, and carrying out a catalytic oxidation reaction at 300-400°C and atmospheric pressure to convert Freon into CO₂, HF, HCl, and H₂O; the reaction products are then condensed, absorbed by alkaline solution, and adsorbed by activated carbon before being discharged in compliance with standards. This invention addresses the problems of easy agglomeration, poisoning, and short lifespan of single-component palladium catalysts by introducing a cerium component to construct a Pd-Ce synergistic system, effectively inhibiting palladium particle migration and agglomeration, and enhancing the catalyst's resistance to carbon deposition and halogen poisoning. This invention has advantages such as high degradation efficiency, long catalyst lifespan, mild process conditions, and no secondary pollution, and is suitable for the harmless treatment of waste refrigerants and industrial waste gas containing Freon.

The invention relates to a mining fluoride-free sodium silicate / polyether / polyisocyanate ternary composite spraying foam material and a preparation method thereof, and belongs to the technical field of coal mine underground spraying sealing air leakage stopping materials. The material is composed of a component A, a component B and a component C, wherein the component A comprises sodium silicate water glass, glycerol and a nonionic surfactant; the component B comprises polyether polyol, hard foam silicone oil, a catalyst and an antistatic agent; and the component C comprises polyisocyanate, chlorinated paraffin, a flame retardant and a foam stabilizer. During preparation, the component A and the component B are mixed and then mixed with the component C through spraying equipment according to the volume ratio of 1: 1, then spraying is conducted, and foaming curing forming is conducted within several seconds. A Freon foaming agent is completely not needed, so that the environment-friendly property is good; the obtained foam material has excellent bonding strength, tensile strength, flame retardance and antistatic property, the reaction temperature is lower than 100 DEG C, the percentage of closed area is larger than or equal to 90%, the foaming ratio reaches 25-30 times, and the foam material is suitable for sealing and leaking stoppage of underground coal and rock mass of a coal mine, safe, reliable and low in cost.