Under the condition of total hardness of circulating water 10～20 mg/L,concentration of MoO 4 2- 13～20 mg/L,phosphonic acid 15 mg/L,Zn 2+ 4 mg/L,a result shows that the average corrosion rate of test tubes is 0.003 6 mm/a,average fouling adherence rate is 7.0 mcm,while limiting fouling heating transfer resistance is nearly equal to zero.
The analysis showed that the treated wastewater was filtrated and sterilized, then can be directly reused in the circulating water system, when COD content of raw wastewater ≤1000mg/L, NH3 - N≤40mg/L, oil content≤500mg/L, sulfide content ≤10mg/L and PH =6-9. Primary quality index of wastewater reused can meet the requirement of circulating water specified by SINOPEC.
The cost of circulating water pre-treating is 0.83 yuan/m3 in 2003, and 0.81 yuan/m3 in 200land 2002. In it, the cost of chemicals is the highest, about 35%.
As intermittent orbit, the results show that the average COD removal rate was beyond 95% when the concentration of the circulation water was 3000～4000 mg/L around, and discharge of the circulation water was between 100～200 L/h, and the aeration strength was 40～60 L/h, the volumetric load could achieve 10 kg/m 3·d.
Cr2AlMo Steel is the newly developed low alloy steel based on 12Cr2AlMoV steel ,which has high resistance to SSCC in wet H 2S environment,and low corrosion rate under cooling water comparing with carbon steels such as 20g.
在抗H2 S -HCN -H2 O系应力腐蚀用钢 12Cr2AlMoV钢的基础上开发出来的 0 8Cr2AlMo钢具有和 12Cr2AlMoV钢相当的抗硫化氢应力腐蚀开裂的能力 ,同时还具有比碳钢与12Cr2Mo1钢高的抗循环水、软化水及盐酸水溶液的耐蚀性。
The results showed that the quality of the treated wastewater can be used as the cooling water of coal-fired power plants. The COD, BOD5, SS and NH3-N of the treated wastewater are respectively less than 10mg/L and 5mg/L and 0.1mg/L and 1.0mg/L. Their corresponding removal rates are 95%, 94%, 99% and 97%.
In this paper the quality of the turbid recirculating water attain the standard of recycle( the oil content>5 mg/ L, TSS<20 mg/ L), making use of the flocculating method and ozones technology to dispose the turbid recirculating water .
Corrosion-electrochemical behavior of tube stills of a 18-10 steel combined with the case component members from plain carbon steels in circulating water of petroleum refineries is investigated.
We present the results from an experimental investigation of the methods of aerodynamic action on the processes of evaporative cooling of circulating water in a cooling tower.
When circulating water was heated by ascending heat flow, gold would be extracted, concentrated and transported from auriferous rocks and then precipitated in the masses during the late tectonic movement.
We describe the water chemistry of circulation heat-transfer systems (cooling and heat-supply networks) at which the pH value of the circulation water lies in the range 7.0-8.3.
In addition, the experiment indicates that this novel chiller is highly suitable for an air conditioning system with a low dehumidification requirement or a system with a large cycle flowrate and an industrial cooling water system.
The level of physical parameters is treated that corresponds to the interaction between molten core droplets and cooling water in the case of severe accident in a nuclear reactor.
It is shown that, among the materials considered, those holding most promise for the development of adsorption systems for cooling water are new composite selective water sorbents, primarily KSKG silicagel modified with calcium chloride.
A description of promising developments of the equipment for the ball-cleaning system of turbine condensers and filters for additional cleaning of cooling water is presented.
We then released 10 randomly chosen ayu and other cyprinids, 10 Tribolodon hakonensis and 10 Zacco platypus, into each of the four ponds with recirculating water.
循环水
circulating water
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