REGAL GAS CHLORINATOR OPERATION USING RECIRCULATED WASTEWATER
การทำงานของถังบำบัดน้ำเสียแบบคลอรีน REGAL โดยใช้น้ำเสียหมุนเวียน
การทำงานของถังบำบัดน้ำเสียแบบคลอรีน REGAL โดยใช้น้ำเสียหมุนเวียน โดยจะเป็นการติดตั้งทั่วไปโดยใช้น้ำเสียหมุนเวียนเพื่อใช้งานภายในโรงบำบัดน้ำเสีย โรงงานแปรรูปอาหาร โรงงานแปรรูปเคมี หรืออุตสาหกรรมอื่นๆที่คล้ายๆกัน เนื่องจากน้ำเสียต้องได้รับการบำบัดอย่างเหมาะสมก่อนจึงจะปล่อยได้อย่างปลอดภัย พื้นที่หนึ่งที่สามารถปฏิบัติการอนุรักษ์น้ำได้ คือการใช้น้ำที่ปนเปื้อนเพื่อควบคุมแก๊สคลอรีน เนื่องจากแก๊สคลอรีนต้องการน้ำในการเปิดสุญญากาศ
Fig. 1 -Typical Installation using recirculated wastewater to operate REGA’L Gas Chlorinator.
OF SPECIAL INTEREST FOR:
• Wastewater Treatment Plants
• Food Processing Plants
• Plating Operations
• Chemical Processing Plants
• Cooling Towers
• Similar Operations
Concern for our water supply as a valuable natural resource coupled with the rising cost of potable water are both strong reasons to conserve fresh water usage. Any reasonable steps that can be taken to curtail the wasteful use of fresh water should be taken.
Because wastewater must be properly treated before II can be safely discharged, one area in which fresh water conservation can be practiced Is in the use of contaminated water to operate a gas chlorinator. Since gas chlorinators require water to ope1ate a vacuum, producing ejector, it is often possible to recirculate a partition of contaminated water through the ejector, rather than using a fresh water source.
IMPORTANT ADVANTAGES OF USING CONTAMINATED WATER FOR EJECTOR OPERATION
1. Fresh water conservation .
2. Cost-savings by the elimination of fresh water usage.
3. Possibility of cross,connectlon between fresh water supply and contaminated water is avoided. Also eliminates piping that would otherwise be required to install a regulation· required air break between contaminated water and fresh water supply.
4. Mixing of chlorine Into solution is improved.Chlorination is one of the most important treatments that wastewater receives to put It into condition tor discharge. Because gas chlorination is the least labor-intensive and most cost-effective method of chlorinalion, it is also the most widely·
used.
The vacuum-prOducing ejector of a gas chlorlnator can use less-than,pure water to create the vacuum necessary to feed the chlorine gas. Therefore, this application represents an ideal opportunity to use contaminated water, thereby conserving fresh water and reducing costs. As long as the wastewater does not contain material large enough to clog a bOoster pump or an eject· or nozzle orifice, or if such material can be strained out, the wastewater can be used instead of fresh water to supply the ejector’s water and pressure requirements. The problem of plugging the ejector can be further minimized by using a vacuumproducing nozzle with a large orifice to permil easier passage of waste material.
INSTALLATION
The basic approach to just aboul any wastewater application involves the same general prbcedures. (See Fig. 1}
1. Water to operate the ejector is withdrawn from the cleanest portion ot the wastewater stre????m.
2. The water is strained 10 remove any bulk that might clog the bOoster pump or ejector.
3. It is fed to a bOoster pump which bOosts the pressure to the re· quired level and which also supplys the necessary water tlow (gpm, Lise<:.) to opera,e the e)e<:tor (See Application Bulletin 1002). An open impeller type pump Is recommended for water with heavy bulk concentration.
4. The wa1e, is strained again before it passes through the ejector. As the water Is forced through the ejector nou:1e, 11 creates a vacuum which operates the gas Chlorinator and draws chlorine gas into the wate, at the rate to which the chlorinator is adjusted.
5. The resulllng chlorine solution is discharged back into the main wastewater stream from which the water was originally withdrawn.
a. To insure efficient mixing, the discharge poinl should be as close as possible to the wastewater influent.
6. Installations utlllzlng a self-priming pump mus! have a vacuum breaker (also see No. 7 below) installed in the ejector water supply line if the ejector Is located more than a few feet above the wastewater In the contact chamber.
a. The vacuum breaker is a ball check valve that is installed In the water line in an inverted pcsition. When water Is pumped through the valve and ejector, the water pressure forces tho ball up to seal off the valve.
b. When the booster pump is shu1 oft, the water in the tine drains back down to the contact chamber. Without the vacuum breaker. this flow ot water would cause a vacuum In the ejector. This would draw c,hlorine gas into 1he line. As the remaining water drains out, the line can fill up with raw chlorine gas which would be discharged in a burst when the booste, pump was next turned on. In addition, some of the Chlorine gas In the line might enter the booster pump while it is shut off possibly resulting In damage to the pump. The vacuum breaker prevents both of these from happening. With the vacuum breaker installed, the ball will fall when the pump is shut off allowing air, rather than chlorine, to enter the line to satisfy the vacuum.
7. a. Another solulion 10 the situation outlined above is to install an anti•siphonlsecondary check valve In the vacuum line connecting the ejector and the chlorinator. This spe,clal, spring-opposed, normally-closed valve is also connected to the ejector water supply line. When the ejector water supply (pump) Is turned “on”. the pressure of the supply water causes the valve to open, thereby, permitting the vacuum produced by the ejector to reach and operate the chlorinator. When the pump shuts off, the water pressure is removed from the valve and the valve closes, separating 1he chlorlnator from any vacuum that might be produced by water draining from the system.
Fig. 2a – &:hernallc Fig. 2b – Detail
b. This valve also acts as a secondary check valve if dirt or mineral deposit buildup should Interfere with the opera· lion of the primary check valve in the ejector. H water Should leak by the primary check valve, the pressure of this water would offset the water pressure that was causing the valve to open and the valve would close. This prevents any water from reaching the chlorinator.
Although these general Installation guidelines have been writ· ten around a wastewater treatment plant, this information may be applicable tor industrial and commercial use, also. In· dividual Installations should be modified to meet appropriate regulations and 1he requirements ol 1he specific application.
หากท่านกำลังมองหา อุปกรณ์ควบคุมการจ่ายคลอรีน ด้วยวัสดุที่ทำมาเฉพาะ ทนการกัดกร่อน และได้มาตรฐานความปลอดภัย FDA ติดต่อเราตามช่องทางด้านล่างนี้นะคะ
