Closed cooling tower and closed circulating water system

A closed cooling tower and internal circulation technology, which is applied in water shower coolers, direct contact heat exchangers, heat exchanger types, etc., can solve fouling, reduce heat exchange efficiency and cooling capacity, and reduce heat transfer area and other problems, to achieve the effect of improving heat transfer capacity, reducing scaling, and improving heat transfer efficiency

Inactive Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utility model increases the packing in the shell, although the cooling water residence time is prolonged, the heat exchange area is increased, and the cooling effect is improved to a certain extent, but because the spray water and the cooling water flow in parallel, the wind and water are reversed, and it is easy to leak in the pipe. Dry spots on the bottom cause fouling and reduce the heat transfer area, thereby reducing heat transfer efficiency and cooling capacity

Method used

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  • Closed cooling tower and closed circulating water system
  • Closed cooling tower and closed circulating water system
  • Closed cooling tower and closed circulating water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] use image 3 The process flow shown and figure 1 The fluid cooling tower shown has a treatment scale of 600m 3 / h, in July to August in summer, the monthly average temperature is 26°C, the daytime wet bulb temperature is 26.3°C, and it will decrease at night, the inlet temperature of the cooling medium is 40°C, and the outlet temperature of the cooling medium to be treated is 30°C. Among them, the flow of spray water is opened to 300m 3 / h, tap water is used for spray water replenishment, and the conductivity is 265μs / cm. The treatment capacity of the reverse osmosis device in the side line of the circulating spray water is adjusted according to 3% of the actual spray water flow, that is, 9m 3 / h. The heat exchange coil adopts sintered high-flux tubes, and the cooling medium inlet of the coil is on the bottom, the cooling medium outlet is on the top, and the circulating cooling water and spray water adopt a countercurrent heat exchange method. By increasing the air...

Embodiment 2

[0037] use image 3 The process flow shown and figure 1 The closed cooling tower shown has a processing scale of 600m 3 / h, in October, the monthly average temperature is 13.7°C, the maximum wet bulb temperature is 15°C, the inlet temperature of the cooling medium is 40°C, and the outlet temperature of the cooling medium to be treated is 30°C. The flow rate of spray water is 50-200m 3 It can be adjusted within the range of / h, and tap water is used for spray water replenishment, and the conductivity is 247μs / cm. The heat exchange coil adopts sintered high-flux tubes, and the cooling medium inlet of the coil is on the bottom, the cooling medium outlet is on the top, and the circulating cooling water and spray water adopt a countercurrent heat exchange method. Considering the large temperature difference between day and night, the ambient temperature drops to 2-6°C at night, so the spray water flow can be adjusted to 50m during this time period. 3 About / h, using slow flow o...

Embodiment 3

[0039] use image 3 The process flow shown and figure 1 The closed cooling tower shown has a processing scale of 600m 3 / h, in December, the monthly average temperature is -10°C, and the water has already frozen. Regardless of the wet bulb temperature, the inlet temperature of the cooling medium is 40°C, and the outlet temperature of the cooling medium to be treated is 30°C. The heat exchange coil adopts sintered high-throughput tubes, and the inlet of the cooling medium of the coil is on the bottom, and the outlet of the cooling medium is on the top. Stop the external circulation loop, that is, stop the spray water, filter and reverse osmosis device, drain the water in the sump, and only adjust the air volume of the axial flow fan of the closed cooling tower to maintain the outlet of the cooling medium at about 30°C. After 30 days of stable operation, compared with the open circulating water system (traditional cooling water tower), it can save 98% of water and 20% of elect...

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Abstract

The invention discloses a closed cooling tower and a closed circulating water system. The closed cooling tower comprises air inlet, a spray thrower, a heat exchange coil, a PVC heat exchange layer, a water collecting tank and an axial flow fan. The top and one side of a tower body are provided with the air inlets. The other side of the tower body is provided with an air outlet. The axial flow fan is installed at the air outlet. The heat exchange coil is arranged on the upper portion of the tower body. The spray thrower is arranged over the heat exchange coil. The PVC heat exchange layer is arranged under the heat exchange coil. The water collecting tank is arranged below the heat exchange layer and at the bottom of the tower body. The closed circulating water system adopting the closed cooling tower comprises an inner circulating part and an outer circulating part. The inner circulating part comprises the closed cooling tower and a heat exchanger. The outer circulating part comprises the closed cooling tower, the filter and a reverse osmosis device. According to the closed cooling tower and the closed circulating water system, the specific closed cooling tower and closed circulating water system are adopted, so that efficient operation of the circulating water system is ensured, the cooling ability is improved significantly, and water consumption and energy consumption are reduced more obviously.

Description

technical field [0001] The invention belongs to the technical field of industrial water saving, and in particular relates to a closed cooling tower and a closed circulating water system applied to petrochemical enterprises. Background technique [0002] The existing circulating water systems of petrochemical enterprises all adopt an open structure, that is, the traditional open cooling tower. On the one hand, it causes a large consumption of fresh water (mainly manifested as evaporation loss, wind blowing loss of air cooling tower and backwash water consumption of side filter) ), the water consumed by the general circulating water system accounts for 2 / 3 of the industrial water consumption, or even more; Scale, forced to add a large amount of scale inhibitors, corrosion inhibitors, fungicides and other chemicals, which is uneconomical and produces secondary pollution. [0003] The main equipment in the closed circulation water system is a closed cooling tower, which places ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28C1/14F28F25/02F28F25/10
Inventor 马和旭郭宏山方向晨徐宏李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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