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方舟

What are the types of industrial closed cooling towers

Closed cooling towers are classified by flowing water, including cross flow, counter flow and compound flow. Compound flow and cross flow are generally referred to as the same inflow. Countercurrent type refers to that the closed cooling tower is equipped with air inlets at the lower or both sides of the tower, the gas enters from the bottom, and the top is equipped with fans, which will introduce mixed water gas from the bottom to the top and discharge it; The cross flow type means that the gas enters from one side of the closed cooling tower according to the seal, and the mixed steam is discharged from the top of the other side according to the fan, which is parallel to the automatic spraying system. The circulating cooling water in the closed cooling tower has different fluidity, so the closed cooling tower can be divided into sprinkler type, thin sheet type and drip type.

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Why does a closed cooling tower need an expansion tank?

Generally, only the chilled water system can have it. The open system with the cooling tower still has an expansion tank, which is still needed at this time. That is to say, this system is an open cooling tower in summer, so the schematic diagram you see is actually for winter operation. What expansion tank is set? Even if the cold water of the closed cooling tower has much expansion? Open cooling tower should be able to use atmospheric constant pressure. The sump of your closed cooling tower is actually more powerful than the expansion tank. Open systems are certainly not required. But I have a project, ground source heat pump. The water of buried pipes is a closed system. Considering the heat balance in winter and summer (Jiangsu and Zhejiang regions). The ground source heat pump is equipped with a cooling tower. However, the cooling water system is a mixture of closed and open type. When the closed cooling tower is not used, there is no problem. The inlet and outlet solenoid valves can be turned off. However, when using a closed cooling tower, I was worried about what would happen to the constant pressure expansion tank in front of the water pump. To put it simply, the cooling tower is open at atmospheric pressure, but there is a constant pressure tank in front of the water pump. Is there any problem. I think the statement of "May 6" is reasonable. Closed cooling tower is unnecessary.

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What do you know about the atomizing nozzle on the closed cooling tower?

The atomizing nozzle on the closed cooling tower is an important equipment component, why do you say so? Most of the heat exchange of closed cooling tower will also be carried out in the cooling fin of water spraying filler. The more complex the filler is, the slower the water flow rate will appear. Moreover, the wind resistance caused by the filler will also appear larger. In order to reduce the wind resistance, special attention should be paid to reducing the complex appearance of the filler surface at this moment, which is the unity of the contradiction, that is, the best point of heat dissipation and wind resistance, It is always the people in the cooling tower who are constantly discussing, summarizing and pursuing. So far, no one dares to say that their filler is good, but only better or better than before. The spray type closed cooling tower does not need water spraying filler to dissipate heat, which reduces the ventilation resistance and increases the air flow into the tower. At this time, it will also promote the droplet to fully dissipate heat in the tower. Spray nozzles, also known as atomizing nozzles, rotate atomizing equipment. The swirling atomizing nozzle in the water distribution system is also the end device. The cooling water enters the cavity of the swirling device under a certain working pressure. With the effect of the core column, the geotextile must also pay attention to making the water flow rotate and spray upward from the nozzle at a 30 ° cone angle to become small particles. The traditional closed cooling tower will use the mechanical rotating fan at the top of the tower to carry out air extraction, so as to promote the formation of negative pressure in the tower, and set a certain amount of air flow. The mechanical power is driven by the motor. For the larger closed cooling tower, special attention must be paid to the need to reduce the speed of the reducer to directly ensure the rated speed of the fan itself.

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Why to add circulating water tank to closed cooling tower

Why is circulating water tank added to closed cooling tower? Because the characteristic of closed cooling tower is to close the liquid circulation step by step, and then transport abundant energy, therefore, in our coil heat exchanger, we carry out heat exchanger for liquid, flowing gas and self spraying water to carry out closed circulation. The circular stainless steel sink can be environmentally friendly and energy-saving. Compared with the open FRP cooling tower, the closed FRP cooling tower has a series of characteristics, such as good thermal insulation, high processing quality, anti fouling, and stable refrigeration performance of machinery and equipment. The structure of closed cooling tower is mainly composed of heat exchanger fan coil, shell and support, smoke exhaust fan and motor, water distribution automatic spraying system, water filter, centrifugal water pump, pipeline and many other components. However, it should be noted that in most cases, it must be equipped with a water tank. For the water tank of the closed cooling tower, the most common raw materials are stainless steel plates or FRP anti-corrosion raw materials, which will have excellent compressive strength and corrosion resistance. The shell is square, which is also beautiful from the perspective of modeling design, and the general water tank varies from 0.5 square to 20 square. As far as the bottom of the stainless steel water tank is concerned, we will generally continue to equip centrifugal pumps and water pipes. When installing the circulating water tank, our company summarized the following aspects: 1. Improve the function of water and water supplement for the sealed circulating system software, especially in winter, moderately improve the automobile antifreeze; 2. As a stable working pressure equipment, it can effectively increase and relieve pressure in the whole process of all closed circulation to avoid water leakage; 3. Remove unnecessary gas from pipeline and FRP cooling tower coil; 4. In winter, when there is no application or shutdown, the substances in the fan coil of the glass fiber reinforced plastic cooling tower can be removed into the water tank to prevent cold; 5. The water tank is generally equipped with liquid level indicator to detect unnecessary gas in the pipeline; As for the closed cooling tower water tank, it is connected with the full-automatic infusion equipment according to the pipe socket, so that it is convenient to fill the circulating water or other circulating liquids.

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How to maintain the working efficiency of closed cooling tower?

The closed cooling tower shall contact the coil fan with water to ensure the cooling target according to the heat value of the cooling steam consumption rate in the wall thickness heat conduction fan coil in the subtropical climate. The refrigeration cooling circulating water in the closed cooling tower only conducts vapor heat conduction inside the cooling tower, and then contacts with the coil fan to obtain the heat value of the steam consumption rate in the fan coil, and the moisturizing and water make-up pipe should properly moisturize and replenish water. Compared with the open cooling tower, the distinctive feature of the closed cooling tower is to improve the coil fan. The steel circulation in the steel coil fan does not directly contact with water, and the heat conduction is conducted according to the wall thickness. In the whole process of actual maintenance, anti-corrosion paint or lubricating grease must be treated for rust prevention or maintenance.

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Basic principle of closed cooling tower water circulation system (text and diagram description)

Basic principle of closed cooling tower water circulation system: Closed cooling tower is to use the working pressure caused by centrifugal water pump or other working pressure equipment to make the water with high temperature from cooler, absorber or process technology, that is, cooling circulating water, be transferred to the cooling fan coil of the closed cooling tower. The cooling circulating water enters the closed cooling tower, and the heat exchange is carried out according to the fitness exercise in the closed cooling tower and its contact with the wind liquid, The intelligent return water after entering the closed cooling tower generates small raindrop particles that spray vertically downward at high speed for fitness according to the working pressure swirl nozzle equipment installed at the top of the tower and the upper end of the air duct, completing the daily task of expanding the area of water droplets.

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What are the differences between closed cooling tower and open cooling tower and their actual effects?

Difference between closed cooling tower and open cooling tower The basic principle of open cooling tower is to spray cooling circulating water on the fiberglass package in the form of spray. The heat exchanger can be completed according to the touch of water and gas, and then there is a cyclone circulation system of the centrifugal fan drive tower body to discharge the warm air behind the heat exchanger, thus completing the cooling. This cooling scheme has less investment in the early stage, but its operating cost is high (water and electricity consumption). The basic cooling principle of closed cooling tower is simple closed automobile circulating cooling tower and closed circulating cooling tower. The air conditioner copper tube cooler is a key component, without filling materials.

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What is the reason why the closed cooling tower is always replenishing water? How to solve this problem

The closed cooling tower has no external water reservoir, but a water reservoir is designed at the bottom of the FRP cooling tower, and there is a fully automatic water make-up equipment. The closed cooling tower water supply system is a complete automatic control system, which only supplies water to pipes or other water supply equipment. But if the direct water supplement is abnormal, what is the cause of the direct water supplement?

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