When He Minghui Luoyang Oil Construction Company was in the same phase, Puerer’s violent bureau Wei Qing Yang was at 0, dolphins were added at 4, and the result was that the liquid quality was lower than that required for the small mouth.
The main word air atomized crude oil nozzle laboratory test Dagang Oilfield in 1997, 38 original furnace heating furnace. The average daily burning of crude oil (9) is the external oil, the oil, the water content is small. 5. Crude oil contains 5,460 light oil components, which have deep processing value. According to the price of 200 yuan per ton of crude oil, if you save 5, you can save nearly 550,000 yuan per year. This is ok. It is of great economic significance to increase the combustion efficiency of the crude oil heating furnace burner for energy saving and consumption reduction in the oil field.
In the liquid fuel combustion process, the atomization quality of the fuel directly affects the combustion efficiency and the rate of generation of combustion pollutants. In the cold state experiment of the burner, the characteristics of the burner field were rapidly studied, and the newly designed atomizing field of the original nozzle was tested and studied. The experimental results of the nozzle structure and atomization mechanism were obtained. In response to the situation of the marginal oil zone, the author developed a new type of pneumatic swirling atomized crude oil burner nozzle, structure 1.
The nozzle adopts an internal mixing air swirl atomization method, and air is ejected from a radial orifice of the central air pipe. Sub-deterioration with the periorbital perforation of the trachea. The mixed oil and gas are spirally ejected through the swirling passage of the nozzle.
And friction with the air inside the furnace to form a first atomization 1 oil pipe; 2 gas pipe; 3 jets; 4 external nozzles; 5 cyclone experimental device and experimental instrument experimental device such as Pavilion 2; school draft Lushan pump plus jade , enter the nozzle through the flowmeter pressure. After the air is filtered, it is pressed into the buffer tank by the compressor, and is mixed with the oil through the nozzle inner tube and then ejected.
The experimental simulated oil was prepared by adding polyacrylamide to water. The water mist sprayed from the nozzle is recovered from the water tank and recycled. The atomizing gas volume flow rate is measured by a glass rotor flowmeter turbine flow meter, respectively. The nozzle is fixed on the spray test rack. The installation should ensure that the nozzle axis is vertically downward to accurately determine the spatial position of the measuring point.
The key instrument for the experiment is the adaptive phase Doppler laser. This course is part of the research of the China Petroleum and Natural Gas Corporation scientific research and the overall optimization plan of the crude oil tubular heating furnace of the technology development project. Qiu Qiqi, associate professor, was born in In 1956, he graduated from East China Petroleum Institute in 1982, and now holds a Ph.D. degree in chemical machinery from the University of Petroleum in Beijing. Address 257061 Received date 2000 diameter and particle concentration of the most advanced non-contact tester. The instrument relies on the frequency difference or frequency shift of the light wave between the scattered light and the illumination light in the fluid to obtain the velocity information, and the phase drift between the two or more optical frequency signals generated by the moving particles to determine the particle Spatial and temporal distribution of size and concentration.
2 experimental device means 1 water tank 2æˆ3 pump 4. version force 5 gauge; 6 nozzles; 7 sinks; 8 buffer tanks; 9 brackets; 10 reciprocating compressors; air filter test, the laser emitted by the laser is The color separation beam splitter is divided into a mountain blue light and two green light. A transmitting probe is transmitted through the optical fiber, and ii is in focus. Phase Doppler and frequency-shifted Doppler signals are generated when the moving particles pass through the laser focus. The human receiver transmits the received Doppler signal to the photoelectric conversion receiver through the optical fiber, and converts the converted electrical signal into the signal processor. The processor passes the measurement data through the direct access chain, and the Heren cable is sent to the accounting machine, and the software based on the 18 platform is used, and the calculation results are obtained.
Experimental content and steps Experimental purpose station utilization, 1 system and experimental device measurement nozzle test main content has different fuel quantity atomization gas volume spray violation distribution atomization particle size and concentration distribution = atomization 7-foot pressure and atomization in experiment The air pressure remains equal. Assume that the atomization field is axisymmetrically distributed. According to the atomization of the nozzle, 17 measurements are set from the nozzle to the entire atomization field. The cows are arranged at each measurement radius 1 according to the characteristics of the atomization field. Point, a total of 272 points are used in the system. The system measurement of the atomization field is a multi-link process, and it is necessary to play a multi-faceted work instrument and peripherals. The steps are as follows: 3. Prepare the coordinate data file of the measuring point, and input 1 software to edit the experimental setting file and save the disk 2 to activate the automatic coordinate frame; start the software and open the preset experimental setting file. Waiting for the test; start the air compressor. The gas in the buffer tank is brought to the set pressure, and the valve is slowly opened, the centrifugal pump is started, the output pressure is adjusted, the nozzle valve is opened, the atomization air pressure and the nozzle water pressure are adjusted to a predetermined value 8 to be stabilized after the spray is stabilized.
Experimental results and analysis of atomizing gas volume The atomizing gas volume is related to the nozzle structure and operating parameters. Under the premise of ensuring the atomization quality, the smaller the gas consumption, the more suitable for the marginal oil field.
This station uses the air as the atomizing gas. If the nozzle atomizes the gas, the required compressor displacement is large, and the total efficiency will decrease. The oil flow rate and the atomization gas flow rate increase with the pressure, and the gas-liquid mass ratio also changes. The atomizing gas volume of the nozzle under different pressures is as follows.
Atomization pressure fuel flow atomization gas volume gas-liquid mass ratio can be seen from 1 that the gas-liquid mass ratio of the nozzle is lower than that of the steam atomizing nozzle. The gas-liquid mass ratio is 0.24 0.50. The atomization required by the nozzle of the researcher The gas volume is small, and the concentration distribution of the concentration distribution in the radial direction is more suitable for the marginal oil day of the plant. It can be seen from 3 that the particle concentration is smaller at the measurement section axis and at the outermost end. In the middle of the section in the radial direction of the section test, the maximum value is reached. The experiment also shows that as the distance of the measuring section from the nozzle increases, the concentration value along the radius also changes, but the distribution trend is basically similar. The bell-shaped distribution of this particle concentration is clear, and there is an air column in the center of the atomization field. The gas column is more conducive to the mixing of the oil droplets and the air, and the combustion can be performed simultaneously on the inner and outer combustion surfaces, the combustion intensity is high, the combustion efficiency is high, and the combustion performance of the burner can be significantly improved.
The bell-shaped distribution of the fog particle concentration reflects the idea of ​​high-strength double-sided stable combustion of the nozzle. The formation of the bell-shaped distribution depends on the structural form of the nozzle. The gas-liquid mixture in the mixing chamber is forced by the cyclone to make a strong rotation radius position, and the 1 yang tS pressure plant is 0. When the speed is changed, the vector cabinet is burned and burned. The burning speed, depending on the turbulence of the drip strength, can accelerate the mixing of the oil mist and the air and increase the stability of the oil drop flame.
Through the experimental analysis of the pneumatic swirl atomizing nozzle, the following conclusions can be drawn: when the atomization pressure is 0.43, the droplets are too small, and the diameter distribution of small diameters can reach a good combustion state.
In the atomization field, the particle concentration in the radial direction is bell-shaped, that is, the air column exists in the center, which is beneficial to improve the combustion intensity and the stability of combustion.
The atomizing gas is small, and it can be supplied by a small compressor. The power consumption is small and the maintenance is convenient. It is especially suitable for the crude oil heating furnace burner in the marginal oil field or the non-supporting steam boiler.
J Chang Hongzhe Zhang Yongdian Shen Jiqun fuel burning plum hff5i!
2 In addition to Shilan. Liu Liu initiated and so on. Development and application of high efficiency air atomizing oil nozzle for + type heating furnace. Fushun Petroleum Institute Journal, 1999J9 This article 王 Wang Zhi 1 atomization pressure, 334 zero jade force and Souter diameter relationship can be seen from the lower pressure, the atomization effect is poor.
The pressure is increased and the atomization particle size is reduced. 1 The atomization pressure is 0.4. At 1 o'clock, the atomized Souter diameter of the whole field is less than 24, that is, from the atomization particle size, the need for good combustion has been achieved. When the atomization pressure is 0.4513. The diameter of the droplets of Souter is changing with the atomization force. However, when the atomization pressure is small, the diameter of the cable is not changed greatly with the increase of the atomization pressure, which indicates that the radius is 0101. The concentration is lower than that of the semi-lun 1 position, which indicates that under the atomization force. The atomization speed is small. The crushing force of the cyclone separation is also not formed in the middle air column. Therefore, for a nozzle of a fixed structure size, the nozzle has a minimum atomization pressure, and only when the atomization pressure is greater than this value, a good swirling flow can be formed, and the entire field of Souter is calculated according to the average diameter of each point measured under different pressures. Diameter and draw the relationship between the drop and the pressure. 4.
After the ice is removed from the servant nozzle, the light velocity of the jet is outside the velocity component, and there is a distributed circumferential velocity component. Thus the droplet is subjected to a strong centrifugal force in the 5 cavity. The droplets are diffused outside, and the droplets are formed in the middle of the atomization field. The droplets progress in the diffusion process, the gas is frictionally torn, and smaller droplets are formed, and the penetration speed of the droplets is lowered due to the resistance of the air. A low concentration region of the edge is formed, thus forming a bell-shaped distribution of the concentration in the radial direction.
The nozzle of the structural form has an upper limit of the atomization pressure. After this enthalpy, the atomization effect is mainly affected by the nozzle structure, and it is not clear that the atomization pressure is increased to improve the combustion performance of the burner.
The characteristics of the flow. The nozzle atomization field is radially downward from the nozzle orifice, and the velocity at the nozzle exceeds 308. The edge of the atomization field has a reverse velocity. The phenomenon of open-rolling is 趔嵩s
Elevator Door Modernization, Elevator Door System Modernization, Elevator Complete Door Modernization, Elevator Complete Door System Modernization
Neglecting elevator door equipment jeopardizes riding public safety and increases owner liability. Modernizing elevator door equipment is important in making an older elevator system more reliable, safe, code compliant, efficient, and provides a more marketable appearance. This is particularly true with door operators. Door operators undergo tremendous wear and tear in daily operation. Each time the elevator stops, the door operators are activated at least two times, more frequently if occupants manually hold the doors open. Some elevator maintenance companies report that nearly 75 percent of their service calls are for malfunctioning door operators
Elevator Door Modernization, Elevator Door System Modernization, Elevator Complete Door Modernization, Elevator Complete Door System Modernization
CEP Elevator Products ( China ) Co., Ltd. , https://www.zjsmartcommercialescalators.com