increased capacity for steam blows - SUEZ - Water ... Apr-10 increased capacity for steam blows...

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Water Technologies & Solutions case study Find a contact near you by visiting www.suezwatertechnologies.com and clicking on “Contact Us.” *Trademark of SUEZ; may be registered in one or more countries. ©2017 SUEZ. All rights reserved. CS1118EN.docx Apr-10 increased capacity for steam blows Figure 1: Steam Blows Note: SUEZ purchased Ecolochem in 2005. challenge During the commissioning of a power station in Navarra, Spain, a temporary water treatment system was required to augment the existing water treatment system of a 400MW CCGT power station. A supplementary reverse osmosis (RO) was used, but a sudden and drastic change in feed conductivity caused the system to foul, not meeting the quality requirements, and caused the system to be shut down for several days. solution With the project being delayed, the plant manager called SUEZ to furnish a system capable of delivering 12,000 gpm (2,725 m 3 /hr) of water with a conductivity of less than 1μS, with a feed water conductivity of 1,800 μS and a turbidity of 1.8 NTU, and at a very short notice to keep the timeline for the steam blows. (Figure 1) In order to meet the requirements in quality, time and costs, the solution was to use a combination of SUEZ’s mobile equipment: a MobileFlow* filter trailer feeding a MobileRO*, loaded with cellulose acetate (CA) membranes. The permeate of the RO went to a forced draft aerator (FDA) which subsequently fed, via a pump skid, a standard SUEZ MobileFlow DI trailer, which would be exchanged when exhausted, and regenerated at SUEZ’s service center. Table 1: Specifications Flow Rate 12,000 gpm (2,725 m 3 /hr) Inlet Conductivity 1,800 μS/cm Outlet MobileRO 156 to 176 μS/cm Outlet MobileFlow 0.56 μS/cm The system was commissioned and operated by one of SUEZ’s university degreed Field Service Engineers, so it was a real hands off approach for the customer. The filter trailer was dosed with alum, and lowered the turbidity of the water from 1.8 NTU to 0.1 NTU, in order to make it acceptable for the RO. The RO system was dosed with acid to prevent fouling of the membranes and set at 70% recovery level. It consistently obtained a 90% rejection rate: feed conductivity was 1,800 μS and the permeate conductivity was between 156-176 μS, as defined in the contract. The FDA was here to lower the gas levels in the permeate, which would extend the life of the MobileFlow DI, 3 trailers were then able to produce each 528,000 gpm (119,921 m 3 /h) of demineralized water at a conductivity of 0.056 μS and a flow rate of 12,000 gpm (2,725 m 3 /h).

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  • Water Technologies & Solutions case study

    Find a contact near you by visiting www.suezwatertechnologies.com and clicking on Contact Us. *Trademark of SUEZ; may be registered in one or more countries. 2017 SUEZ. All rights reserved.

    CS1118EN.docx Apr-10

    increased capacity for steam blows

    Figure 1: Steam Blows

    Note: SUEZ purchased Ecolochem in 2005.

    challenge

    During the commissioning of a power station in Navarra, Spain, a temporary water treatment system was required to augment the existing water treatment system of a 400MW CCGT power station. A supplementary reverse osmosis (RO) was used, but a sudden and drastic change in feed conductivity caused the system to foul, not meeting the quality requirements, and caused the system to be shut down for several days.

    solution

    With the project being delayed, the plant manager called SUEZ to furnish a system capable of delivering 12,000 gpm (2,725 m3/hr) of water with a conductivity of less than 1S, with a feed water conductivity of 1,800 S and a turbidity of 1.8 NTU, and at a very short notice to keep the timeline for the steam blows. (Figure 1)

    In order to meet the requirements in quality, time and costs, the solution was to use a combination of SUEZs mobile equipment: a MobileFlow* filter trailer feeding a MobileRO*, loaded with cellulose acetate (CA)

    membranes. The permeate of the RO went to a forced draft aerator (FDA) which subsequently fed, via a pump skid, a standard SUEZ MobileFlow DI trailer, which would be exchanged when exhausted, and regenerated at SUEZs service center.

    Table 1: Specifications

    Flow Rate 12,000 gpm (2,725 m3/hr)

    Inlet Conductivity 1,800 S/cm

    Outlet MobileRO 156 to 176 S/cm

    Outlet MobileFlow 0.56 S/cm

    The system was commissioned and operated by one of SUEZs university degreed Field Service Engineers, so it was a real hands off approach for the customer.

    The filter trailer was dosed with alum, and lowered the turbidity of the water from 1.8 NTU to 0.1 NTU, in order to make it acceptable for the RO. The RO system was dosed with acid to prevent fouling of the membranes and set at 70% recovery level. It consistently obtained a 90% rejection rate: feed conductivity was 1,800 S and the permeate conductivity was between 156-176 S, as defined in the contract. The FDA was here to lower the gas levels in the permeate, which would extend the life of the MobileFlow DI, 3 trailers were then able to produce each 528,000 gpm (119,921 m3/h) of demineralized water at a conductivity of 0.056 S and a flow rate of 12,000 gpm (2,725 m3/h).

  • Page 2 CS1118EN.docx

    results

    The SUEZ water treatment system performed well within the contract requirements. The customer was very impressed with the performance of the equipment and the overall development of the project as, while relying on SUEZ expertise to provide water, no extra resources were needed, and the station steam blow went according to plan. In fact, it was so successful that the customer used our services for their next commissioning of an 800MW CCGT plant near Barcelona.

    Figure 2: SUEZ patented mobile system

    Figure 3: The SUEZ Solution