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Design calculation method for newly-established mechanical ventilation reverse-flow type mist dissipating cooling tower

A technology of mechanical ventilation and design calculation, which is applied in the field of cooling towers, can solve the problems affecting the final effect of fog elimination and investment amount, and achieve the effects of reducing the impact of urban landscape and traffic, reducing industrial water consumption, and improving recycling efficiency

Active Publication Date: 2018-12-18
济南蓝辰能源技术有限公司
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Problems solved by technology

It directly affects the final effect and investment amount of fog elimination, so a new technology is needed to solve the above problems

Method used

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  • Design calculation method for newly-established mechanical ventilation reverse-flow type mist dissipating cooling tower
  • Design calculation method for newly-established mechanical ventilation reverse-flow type mist dissipating cooling tower
  • Design calculation method for newly-established mechanical ventilation reverse-flow type mist dissipating cooling tower

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Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1: Determine the cooling task: the circulating water volume of a single tower is Q2500m 3 / h; circulating water inlet temperature Tw1=37.5°C, outlet water temperature Tw2=27.5°C; ambient air pressure Pa=93.75kPa; ambient air dry bulb temperature θ=5°C; ambient air wet bulb temperature τ=3.52°C; tower length L =11.6m, tower width W=11.6m, thermodynamic characteristics of the selected packing N=An*λ Mn , An=2.6, Mn=0.59, resistance characteristic Δ9.81ρ 1 AV CP m , where A=0.005·q 2 -0.028·q+1.29, m=1.76-0.0006q 2 +0.0009·q

[0041] Assuming that the air-water ratio λ=0.349, the air volume in the wet section Gw=748790m 3 / h, at this time the cooling characteristic number [N]'=2.6λ 0.59 =1.397, reserve 5% margin, [N]=1.327, the number of cooling tasks After comparison, it is found that 1.327>1.315, [N]>N, which means that the thermal calibration is qualified, and the hot and humid air outlet temperature is iterated to 31.34°C.

[0042] Assume that the ...

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Abstract

The invention provides a design calculation method for a newly-established mechanical ventilation reverse-flow type mist dissipating cooling tower. The environment meteorological conditions are determined and include the environment barometric pressure Pa (kPa), the environment air dry-bulb temperature theta (DEG C) and the environment air wet-bulb temperature tau (DEG C); according to the thermodynamics calculation formula, the relative humidity phi, the tower inlet air moisture content x, the dry-bulb temperature corresponding saturated steam partial pressure p theta, the wet-bulb temperature corresponding saturated steam partial pressure p tau and the tower inlet wet air density rho1w are calculated. Through the design, the cyclic utilization rate of water is increased, and the industrywater consumption is reduced. Influences of cooling tower misting on urban landscapes and traffic can be effectively weakened, and the method is most economical and practical for mist dissipating improvement on a large number of cooling towers. By application of the calculation method, parameters needed for the newly-established mixed type mist dissipating tower can be accurately calculated, thefiller size, the mist dissipating module size, resistance checking, mist dissipating effect analysis, draught fan type selecting, cooling tower boundary dimension and economic benefit calculation areprovided for existing mist dissipating tower improvement.

Description

technical field [0001] The invention relates to a design and calculation method for a new mechanical ventilation counterflow type mist-eliminating cooling tower, which belongs to the technical field of cooling towers. Background technique [0002] In the prior art, mechanical ventilation cooling towers are widely used in industries such as petroleum, chemical industry, metallurgy, and civil refrigeration. Water conservation and efficient use of water are crucial to national economic and social development. It is of great practical significance to study the problem of industrial water saving, develop new water saving technology, improve water recycling rate and reduce industrial water consumption. On the other hand, people's requirements for environmental protection are increasing day by day. Fogging from cooling towers severely damages the cityscape and reduces visibility, which affects traffic and aircraft takeoff and landing near the airport. The new hybrid mist elimina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28C1/02F28C1/16
CPCF28C1/02F28C1/16
Inventor 赵元宾陈哲杨玉杰
Owner 济南蓝辰能源技术有限公司
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