798 results about "Drying tube" patented technology

An air dryer and process employs a jet engine for producing high quality dried products. A turbofan jet engine in an air-drying system uses both thermal and non-thermal air-drying. The turbofan jet engine is housed within an air distribution chamber for directing exhaust air and bypass air from the jet engine into a product drying tube, where it is dried through a combination of thermal drying from heat content in an engine exhaust, and by the kinetic energy of air flowing past the product traveling through the drying tube, that may include a physical impediment for retarding retard the speed of the product solids flowing in the air stream through the tube.

The invention discloses a method and a device for measuring a radon exhalation rate on a medium surface. The measuring method comprises a measuring process and a calculating process. The measuring method comprises the following steps: during measurement, inversely covering a radon accumulation chamber on the surface of a medium to be measured; connecting a sealed measuring chamber with the radon accumulation chamber to form a loop; after collecting a certain time period of 5 minutes, turning on an air pump to mix the radon in the radon accumulation chamber and the measuring chamber at a smallflow rate less than 3L/min for 5 minutes, wherein at this time, the radon concentration in the measuring chamber is the radon concentration in the radon accumulation chamber at the time T; repeatedlymeasuring the radon concentration in the radon accumulation chamber to obtain a group of data of radon concentration in the radon accumulation chamber at equal time intervals by taking T which is greater than or equal to 10 minutes as a period; and solving the radon exhalation on the surface of the medium to be measured according to a theoretical formula. The measuring device consists of the radon accumulation chamber, the air pump, the measuring chamber, a secondary instrument and a drying pipe, wherein one end of the air pump is connected with the radon accumulation chamber, while the otherend is connected with the measuring chamber through a pipe; one end of the drying pipe is connected with the radon accumulation radon through a pipe, while the other end is connected with the measuring chamber through a pipe; and the secondary instrument is connected with the measuring chamber.

An improved emission sampling and measurement system is provided for continuously sampling and analyzing the chemical content of a vehicle emissions and the ambient air for data evaluation and comparison. The emission sampling and measurement system comprises a vehicle having an emissions source, devices for intaking vehicle emissions and ambient air, and analysis devices for determining the chemical content of the emissions and ambient air. The gas streams may be dried in a series of selectively permeable drying tubes prior to measurement in the analysis devices, in order to effectuate a more precise sample of the constituent elements of the gases. Following analysis, the data collected is processed, stored, and compared, and the results displayed on a screen in the vehicle driver's compartment in a real-time manner. In this fashion, real-time comparative data analysis is presented in a format not presently available.

A control method of a clothes treatment apparatus is disclosed, the clothes treatment apparatus having a drying duct (1210), a first blower fan (1230) located in the drying duct (1210) to enable circulation of interior air of the drying duct (1210) and a filter (1250) located in the drying duct (1210), wherein the method includes the steps of sensing clogging of the filter (1250),and switching a flow of air passing through the filter (1250) from a first direction to an opposite second direction if clogging of the filter is sensed. Moreover, the control method may include a washing cycle (200) for washing clothes, and a drying cycle (300) for drying the clothes. The implementation time of the washing cycle (200) is less than the implementation time of the drying cycle (300).

The invention belongs to the measurement technical field of atmosphere environment quality, which specifically relates to an online automatic measuring system for environment air quality based on low-temperature condensing method sampling. The system is composed of a low-temperature condensing sampling system and an analyzing system; the low-temperature condensing sampling system comprises a drying pipe, an electronic cold trap and a low-temperature low trap that are connected in turn; the drying pipe is connected with an air inlet pipeline for removing vapor and condensing the environment air sample at low temperature; the analyzing system comprises a light source, a sampling battery, an optical spectrum instrument and a computer; the analyzing system splits and detects the air condensed by the sampling system through the optical spectrum instrument by the ultraviolet function from the light source and then analyzes the air by the computer. The system is high in integrated degree and measuring efficiency, which is suitable for continuous, real-time and online measurement of various pollutants of atmosphere environment (including sulfur dioxide, nitrogen dioxide, ozone, ammonia, formaldehyde and part of benzene series) in environment air.

Disclosed herein is a drying unit for washing machines that is capable of fully drying the wet laundry using hot wind. A condensing duct and a drying duct are connected to a tub to circulate air in the tub. Between the drying duct and the condensing duct is disposed a drying fan. To the condensing duct is attached air cooling device for condensing air in the condensing duct by means of cool air. In the drying duct is mounted a drying heater for heating air in the drying duct to change the air into hot wind. During the drying operation of the washing machine, the air passing through the condensing duct is condensed by air, which is an unlimited resource. Consequently, consumption of energy and resources is minimized during the drying operation of the washing machine.

A fiber optic dry tube assembly and a method of manufacturing the same includes at least one optical waveguide and a tube. The tube houses at least a portion of the at least one optical fiber and is formed from a bimodal polymeric material. The tube has an average ovality of about 10 percent or less. In other embodiments, the bimodal polymeric material that forms the tube has a melt index of about 1.0 g/10 minutes or less, a melt strength in the range of about 8 cN to about 35 cN at 190° C,. and/or a polydisperity of about 7 or greater. Additionally, the dry tube assemblies of the present invention can form a portion of a cable.

The invention discloses a system and method for measuring the evolution rate of radon. The system does not need a drying tube to dry sample gas, thereby reducing the impact on the evolution rate of radon of the internal dielectric surface of a radon collection cover from a drying agent. In a natural environment, a measurement instrument can accurately measure the instantaneous concentration of radon, and does not need to correct the measured concentration of radon for calculation. The measurement instrument can automatically solve the evolution rate of radon through the measured concentration of radon, and can obtain the value of the evolution rate of radon with no need of a PC for linear fitting processing. An experiment indicates that the measurement error of the radon evolution rate measurement instrument is within the range 5% on a radon evolution rate standard device. After measurement, the evolution rate of radon is directly obtained, thereby meeting the demands of on-site measurement of the evolution rate of radon. The system and method are easy to implement, and are high in measurement efficiency.

This invention discloses a glycerol method for preparing epoxy chloropropane. The method comprises: (1) introducing dried HCl gas through 95% glycerol at 90-110 deg.C in the presence of absolute acetic acid, and reacting for 1-3 h; (2) adding the obtained dichloropropanol into a round bottom flask loaded with solid super-strong alkali catalyst, equipping condensing and drying tubes, stirring, heating to 70-90 deg.C, reacting for 3-5 h, filtering, and separating the catalyst to obtain chloropropane.

An apparatus for air conditioning the interior of a structure is shown which can be run entirely off a DC power source, such as a storage battery. A shell and tube heat exchanger is combined with a mechanical refrigeration system to provide a wet shell side and a dry tube side of the apparatus. In the operation of the air conditioner, a mass of distributed water is established on the wet shell side, and a flow of ambient air is passed through the wet shell side to form a resulting stream of moist air. A flow of ambient air is passed through the dry tube side and a resulting stream of dry cooled air is recovered. The streams of most and cooled air can either be combined or routed separately depending primarily upon the humidity of the surrounding environment to be cooled.

The invention provides a pneumatic drying method and equipment thereof for realizing large-flow tobacco material puffing drying treatment; the method comprises the following steps: puffed tobacco material is conveyed to a drying pipe for being dried by hot air flows, and then the tobacco material is separated from hot sir; the drying pipe is composed of a horizontal drying pipe and a vertical drying pipe of which the cross section is more than the cross section of the horizontal drying pipe; hot air with the temperature at 100-250 DEG C and air flow speed of10-50m/s of is sent in the horizontal drying pipe, wherein the air flow feeding direction is vertical to the material feeding direction; the material driven by hot air flows enters in the vertical drying pipe and is ascended in a suspension way, and the ascending speed of the material is reduced to 0.5-5m/s; meanwhile, sundries such as slivers with large density in the material can not be suspended and are separated pneumatically under the wind speed. By arranging the vertical drying pipe with large caliber, the speed of the material, moving upwards along the air flow direction, is reduced, on the premise of not increasing the drying route, the drying time of the material is prolonged, heat-transferring and mass transferring coefficient is improved, and the drying time of the material is improved.

The invention discloses a low-temperature drying cabinet and a method for drying medical equipment by using the low-temperature drying cabinet. The low-temperature drying cabinet comprises a cabinet body (5), an air filtering device (1), an air heating device (2), a pumping device (10), an air exhaust pipeline (6), an exhaust fan (7), a heater (9) and a control device (13), wherein a drying chamber (8) is arranged in the cabinet body (5); a grid rack (3) and a pipeline drying connector (4) are arranged in the drying chamber (8); and the pipeline drying connector (4) is connected with the pumping device (10) and used for drying the inner wall of pipeline type medical equipment. The invention has the advantages of good drying effect on the medical equipment, in particular on the pipeline type medical equipment, high drying efficiency, uniformity in air supply, and no dead area; and by the invention, air which enters the drying chamber (8) can be disinfected and sterilized.

This invention discloses a method for preparing 1, 3-propylene glycol from glycerol. The method has such advantages as high catalytic activity, mild reaction conditions, high product selectivity, high product purity, simple process. The method comprises: (1) adding 95% glycerol and 30% oxydol into a round bottom flask, setting condensing tube and drying tube, heating to 100 deg.C under stirring, and reacting for 1-3 h to obtain acetone alcohol; (2) adding acetone alcohol into a pressure reaction kettle loaded with transition oxometalate catalyst, introducing hydrogen for 4-6 h at 100-200 deg.C and 10 MPa, reacting, and rectifying to obtain 1,3-propylene glycol.

The invention provides a process for drying lauryl sodium sulfate, which belongs to the technical field of preparation of a surfactant in an organic compound. The method is carried out in a compound vacuum drier formed by a vacuum tube type spray drying part (A), an adapting tank (B) and a vacuum scraper drying part (C), and comprises the following steps: (1) preheating a lauryl sodium sulfate material in a preheater to the temperature of between 50 and 100 DEG C, and making the material be in a half atomized state and enter a vacuum drying tube with vapor in the vacuum tube type spray drying part (A) at a pressure of between 0.2 and 1.0MPa by a conveying pump, so that the moisture content of the material is reduced to 50 to 10 percent; (2) introducing the material into the vacuum scraper drying part (C) through the adapting tank (B) for secondary drying, so that the moisture content of the dried material is lower than 3 percent; and (3) according to the prior process, granulating the dried materials through a double screw extruder to manufacture an acicular product. The process has reasonable design, and can effectively improve the drying efficiency and product quality.

The invention relates to a process for producing polyoxymethylene dimethyl ether from methanol and paraformaldehyde. The invention mainly solves the problem of low yield of polyoxymethylene dimethyl ether by using the process for producing polyoxymethylene dimethyl ether from methanol and paraformaldehyde. The process is divided into a reaction zone and a separation zone. The reaction zone includes a nitrogen storage tank, a methanol storage tank, a mixing tank with a heater, a drying tube, a spray tower and a liquid phase reaction still. The process steps in the reaction zone are as below: heating paraformaldehyde in the mixing tank into formaldehyde gas; transmitting the formaldehyde gas by nitrogen purging to the drying tube for water removal; introducing the formaldehyde gas into the spray tower from the bottom to the top; conducting countercurrent contact with methanol in the spray tower to form a methanol solution of formaldehyde and sending the solution to a liquid phase reactor; under the effect of a solid acid catalyst, reacting the solution with a mixture recycling to the reactor to generate polyoxymethylene dimethyl ether. The technical scheme well solves the problem, and can be used in industrial production of polyoxymethylene dimethyl ether.

The present invention relates to drying device of washing machine, and is especially conversion drying device of cylindrical washing machine operating in conversion mode. The conversion drying device includes washing cylinder and drying pipe to supply the washing cylinder with hot air, condensating pipe to suck wet air from the drying pipe, fan set on the drying pipe to dry the exhaust wet air and make the dried air return to the condensating pipe via the drying pipe and exhaust pipe to replace the condensating pipe for preventing exhausted wet air from returning to washing cylinder. There are also water supplying unit inside the condensating pipe, nozzle in the condensating pipe, drying device installing part on one side of washing machine casing. The said drying device structure has the identical connection structure suitable for both condensating drying device and exhaust drying device, and this simplifies the production equipment of washing machine.

The invention relates to an exhaust gas circulating spiral pipe pneumatic dryer and a drying method thereof. A pneumatic drying pipe is made into the spiral pneumatic drying pipe, thereby leading the spiral pneumatic drying pipe to be positioned in a high temperature zone and forming the convection heat transfer in the pipe and the conduction heat transfer out of the pipe, namely the heating of the interior and the exterior of materials is simultaneously carried out, thereby being capable of improving the heat transfer rate and shortening the drying time of the materials. The exhaust gas circulation is further adopted for heating the materials and fully utilizing waste heat in the exhaust gas. The structure comprises a cylindrical container, a first-stage spiral pneumatic drying pipe, a second-stage spiral pneumatic drying pipe, a first-stage drying cyclone separator, a second-stage drying cyclone separator, a first-stage drying induced draft fan, a second-stage induced draft fan and a receiving hopper; the first-stage spiral pneumatic drying pipe and the second-stage spiral pneumatic drying pipe are arranged in the cylindrical container, a hot air inlet is formed at the bottom part of the cylindrical container, a second hot air outlet is formed at the upper part of the cylindrical container, and a first hot air outlet is formed at the lower part of the cylindrical container.