Cooling tower is a device that uses water as circulating coolant to absorb heat from the system and discharge it into the atmosphere to reduce the water temperature. Its cooling is an evaporative cooling device, which uses the principle that water exchanges with air after flowing to generate steam, and the steam volatilizes to take away heat, thus realizing evaporative cooling, convection heat transfer and radiation heat transfer. Dispel the waste heat generated in industry or refrigeration and air conditioning to reduce the water temperature, thus ensuring the normal implementation of the system. This device is generally barrel-shaped, so it is called cooling tower.
What should be paid attention to in the use of medical hanging towers? Mingtai medical hanging tower should be operated in strict accordance with the instructions in use, and more attention should be paid to maintenance at ordinary times.
How to maintain the diamond ring in normal use? Diamonds are lipophilic, so try to avoid oil stains when wearing them. When you wear jewelry, oil will remain on your diamond, which will darken the luster of the diamond. If there is oil stain, clean it with detergent or ultrasonic. Try not to use ultrasonic cleaning for jewelry with small broken diamonds, so as to avoid the broken diamonds falling off.
The following common diamond cleaning methods are recommended:
1, cleaning method of cleaning liquid
Fill a small bowl or teacup with warm water and mix a proper amount of neutral detergent in the water. Soak the diamond in water, brush it gently with a toothbrush, then wrap it with a sieve and rinse it with warm water under the tap. Finally, dry it with a soft cotton-free flannel.
2, cold water immersion method
Soak the diamond in water with a small bowl or teacup for about 30 minutes, then gently brush the diamond in front, back, left and right with a small brush, then shake it in water for a while, then take it out and dry it with a paper towel.
3. Quick cleaning method
Buy a bottle of brand-name jewelry cleaning solution, together with the attached container, and clean the diamonds according to the instructions.
How to collect
The highest grade of diamond on the Mohs hardness scale for measuring the relative hardness of gemstones is 10 degree. It is more scratch-resistant than all other gems, so it is difficult to scratch, so you will find it easier to maintain. However, it should be noted that despite the highest hardness, diamonds may damage each other, so be careful to protect them from rubbing against each other when wearing or storing them. Diamonds are carbon, so it's best to wrap them in soft handkerchiefs instead of artificial plastic boxes. Before collecting jewelry, I suggest you gently wipe it with a soft cloth.
Other tips for caring for diamonds:
1, here are some tips to help you care for diamonds. Please don't get chlorine bleach on diamond jewelry when doing housework. Although it will not damage the diamond, it will make the inlay fade or change color.
Don't wear diamonds when washing dishes or doing rough work. Although the diamond is hard, it may be scratched if it is struck hard according to its grain direction.
Check your diamond jewelry once a year to see if the inlay is loose and worn, re-fix it and renovate it for free.
What problems should be paid attention to in the use of cooler? 1; Pay attention to whether there is leakage inside and outside.
2; Keep cooling water in it all the time.
3; Is there any scale or other debris stuck in it?
4 water pipes should be connected in and out.
How to prevent the enclosed cooling tower from freezing? When there is no heat load in the closed cooling tower in winter, due to the low ambient temperature, the circulating water and spray water in the pipeline will freeze, which will cause the pipeline of the heat exchange and spray system to expand and damage, which will affect the normal implementation of production. When users in the north use closed towers in winter, practical measures must be taken to ensure the normal implementation of closed towers. Generally, the following methods are adopted:
1, antifreeze is preferred. According to the environmental temperature of the place of use and the antifreeze efficiency index, antifreeze suitable for local meteorological characteristics is prepared. In general, ethylene glycol or propylene glycol is added to circulating water, and the ratio can refer to the following table:
Ethylene glycol (%) 0 1020253038404550558 freezing point (℃)-0.03.5-8.0-15-20-25-30-35-40-48.
Note: Ethylene glycol is a colorless and slightly viscous liquid with a boiling point of 197.4℃ and a freezing point of-1 1.5℃, which can be mixed with water in any proportion. After mixing, the freezing point is obviously reduced due to the change of vapor pressure of cooling water. However, ethylene glycol antifreeze is easy to generate acidic substances in use, which has corrosive effect on metals, so an appropriate amount of disodium hydrogen phosphate should be added to prevent corrosion. In addition, at low temperature, the viscosity of ethylene glycol is high, the resistance is enhanced, and the corresponding medium flow rate is reduced.
2. The anti-freezing mode in winter is specially set by our company for winter use. In view of the fact that the production task is full and the production is basically uninterrupted, but the production is stopped for a short time, you can switch to the winter antifreeze mode, set the interval time and execution time by yourself, and the equipment can automatically execute according to the set program. However, it should be noted that: ① working hours should not be too long; (2) Ensure normal power supply; (3) Ensure that there is enough circulating medium in the system. Handan Fengbing enclosed cooling tower
& gt How to clean and maintain the wok in use? Maintenance: 1. If it is dried with fire and coated with a thin layer of cooking oil after each use, the service life of the iron pan can be prolonged and rust can be prevented. 2. When the iron pot is used, it can be baked on the fire and then used on the stove. In this way, the internal and external thermal expansion of the pot bottom is basically close, and the pot bottom will not peel and crack. Cleaning: 3. After the iron pot is used for a period of time, there is often a layer of black stains on the bottom of the pot, which can be removed with an iron brush. If you put a layer of soap on the bottom of the pot before use, even if the bottom of the pot turns black later, you can remove it by rubbing it lightly. The egg marks left by frying eggs in iron pan are not easy to clean. Just put a little salt in the pot and then scrub it with a cloth to remove the egg marks. 5. Wash the used wok with clear water immediately, dry the water with a rag, and do not leave water stains to avoid rust.
How to maintain the digital megohmmeter in use? Maintenance and precautions of digital megohmmeter in use are as follows:
1. When storing the digital megohmmeter, attention should be paid to the ambient temperature and humidity, and it should be placed in a dry and ventilated place, which is moisture-proof, dustproof, explosion-proof, acid and alkali-proof and auxiliary gas.
2. When the measured object is a normal charged body, the power supply must be turned on first, and then the measurement is carried out, otherwise the safety of personal equipment will be endangered! After the high voltage is turned on, there is a high DC voltage between terminals E and L in this table, so you can't touch all parts of the human body when measuring.
3. The digital megger is equipped with a rechargeable battery pack. When the rechargeable battery pack in the machine is lower than 7.2V, the under-voltage symbol will be displayed in the upper left corner of the instrument. It is recommended to charge the battery pack in the machine for about 8 hours in time until the charging indicator light on the panel turns dark and goes out. When the instrument is not used for a long time, the rechargeable battery pack should be charged and maintained regularly.
Wuhan huatian electric power:: wh huatian. /Products.asp？ ID=800300
How to maintain the flash butt welder 1 in daily use? periodic maintenance
The best maintenance time for regular maintenance of flash butt welder should be 2-5 weeks. There will be a lot of dust inside the machine during this time, which needs to be cleaned in time. Only when the flash butt welding machine is in a healthy and clean state at any time, it will not have various faults when it is running.
Second, comprehensive maintenance.
The overall maintenance of flash butt welding machine is generally carried out within 1-2 years, and shall not be delayed or shortened. During this period, the internal parts of flash spot welding machine will be aged and damaged, and some stubborn dust will also affect the execution of the machine. At this time, it is necessary to send the machine to a professional repair shop for work. The repair shop will replace and repair the aging and abnormal parts, and also use professional methods to remove some stubborn stains, so that the flash spot welder can regain its vitality.
Third, why do you want to carry out maintenance?
The maintenance of flash butt welding machine is very necessary. In the long-term operation of the machine, it will be similar to the general fatigue of people. If you don't relax properly, the hidden dangers accumulated inside will become more and more serious until it breaks out and becomes out of control.
How to maintain the automobile cooling system? The industry has conducted an in-depth investigation on the situation that automobile engines waste 70% gasoline energy as heat energy. It is reported that the cooling system of a car driving on the highway emits enough heat to heat two ordinary houses! Therefore, the automobile cooling system is very important. Today, Yixiu. com popularizes the knowledge of automobile cooling system for everyone.
1. Selection of cooling water: It is best to choose river water with low hardness, such as well water, which should be boiled and softened before use, and it is best to use antifreeze.
2. Pay attention to the technical status of each part: if the radiator is found to be leaking, it should be repaired. If the water pump and fan are found to swing or make abnormal noise, they should be repaired in time. If the engine is found to be overheated, check whether it is short of water in time, and stop it if it is short of water. After cooling, add enough cooling water. If the thermostat works abnormally, resulting in the engine working temperature being too high or too low, it should be repaired or replaced in time.
4. Clean the scale regularly: After the engine is used for a certain period of time, scale will be deposited in the water tank and radiator, which will affect the heat dissipation, so it should be cleaned regularly. The cleaning method is to add enough cleaning liquid into the cooling system, soak it for a period of time, start the engine to run at medium and low speed for a certain period of time, then release the cleaning liquid while it is hot, and then rinse it with clean water.
But the automobile cooling system has other important functions. Automobile engines have the best performance at a proper high temperature. If the engine gets cold, it will accelerate the wear of parts, thus reducing the efficiency of the engine and emitting more pollutants. Therefore, another important function of the cooling system is to warm up the engine as soon as possible and maintain a constant temperature.
3. Check and adjust the tightness of the fan belt: If the fan belt is too tight, it will not only affect the cooling air volume, increase the engine workload, but also accelerate the belt wear due to slippage. If the belt is too tight, it will accelerate the wear of water pump bearing and generator bearing. Therefore, the tightness of the belt should be checked in use and adjusted if necessary. If it does not meet the requirements, it can be adjusted by changing the positions of the generator and the adjusting arm.
4. Clean the scale regularly: After the engine is used for a certain period of time, scale will be deposited in the water tank and radiator, which will affect the heat dissipation, so it should be cleaned regularly. The cleaning method is to add enough cleaning liquid into the cooling system, soak it for a period of time, start the engine to run at medium and low speed for a certain period of time, then release the cleaning liquid while it is hot, and then rinse it with clean water.
But the automobile cooling system has other important functions. Automobile engines have the best performance at a proper high temperature. If the engine gets cold, it will accelerate the wear of parts, thus reducing the efficiency of the engine and emitting more pollutants. Therefore, another important function of the cooling system is to warm up the engine as soon as possible and maintain a constant temperature.
3. Check and adjust the tightness of the fan belt: If the fan belt is too tight, it will not only affect the cooling air volume, increase the engine workload, but also accelerate the belt wear due to slippage. If the belt is too tight, it will accelerate the wear of water pump bearing and generator bearing. Therefore, the tightness of the belt should be checked in use and adjusted if necessary. If it does not meet the requirements, it can be adjusted by changing the positions of the generator and the adjusting arm.
4. Clean the scale regularly: After the engine is used for a certain period of time, scale will be deposited in the water tank and radiator, which will affect the heat dissipation, so it should be cleaned regularly. The cleaning method is to add enough cleaning liquid into the cooling system, soak it for a period of time, start the engine to run at medium and low speed for a certain period of time, then release the cleaning liquid while it is hot, and then rinse it with clean water.
But the automobile cooling system has other important functions. Automobile engines have the best performance at a proper high temperature. If the engine gets cold, it will accelerate the wear of parts, thus reducing the efficiency of the engine and emitting more pollutants. Therefore, another important function of the cooling system is to warm up the engine as soon as possible and maintain a constant temperature.
3. Check and adjust the tightness of the fan belt: If the fan belt is too tight, it will not only affect the cooling air volume, increase the engine workload, but also accelerate the belt wear due to slippage. If the belt is too tight, it will accelerate the wear of water pump bearing and generator bearing. Therefore, the tightness of the belt should be checked in use and adjusted if necessary. If it does not meet the requirements, it can be adjusted by changing the positions of the generator and the adjusting arm.
4. Clean the scale regularly: After the engine is used for a certain period of time, scale will be deposited in the water tank and radiator, which will affect the heat dissipation, so it should be cleaned regularly. The cleaning method is to add enough cleaning liquid into the cooling system, soak it for a period of time, start the engine to run at medium and low speed for a certain period of time, then release the cleaning liquid while it is hot, and then rinse it with clean water.
But the automobile cooling system has other important functions. Automobile engines have the best performance at a proper high temperature. If the engine gets cold, it will accelerate the wear of parts, thus reducing the efficiency of the engine and emitting more pollutants. Therefore, another important function of the cooling system is to warm up the engine as soon as possible and maintain a constant temperature.
I adjusted it online, in fact, just follow the maintenance manual strictly.