Lime Across North Texas Industry: Flue Gas Desulfurization at the Kilns, Softening at the Cooling Towers, pH Adjustment on the Finishing Lines
Ellis County kilns, East Texas lignite units, Tarrant County finishing shops and cooling loads all over the Metroplex. Every one of them needs lime arriving at a concentration that does not wander, which is what RDP Technologies designs equipment to deliver.
Put a Question to Us Product RangeWhere the Metroplex Actually Uses Lime
Dallas reads as a services and logistics economy from the outside, which understates what is happening around its edges. One of the largest concentrations of cement production in the country sits half an hour south of downtown alongside a working steel mill. Aerospace and defense manufacturing across Tarrant County runs plating and anodizing at scale. Data center and manufacturing cooling loads keep climbing in a region that never has water to spare. Municipal treatment across the Metroplex is covered on our Dallas municipal treatment equipment page.
Flue Gas Desulfurization at the Ellis County Kilns and the East Texas Lignite Fleet
The cement cluster south of the metro is the sulfur story here. Several very large kilns operate within a few miles of each other in Ellis County, alongside an electric arc steel mill, and that concentration has kept the area under air quality attention for decades. Out east, the lignite fired generating units burn a fuel with a genuinely high sulfur content by American standards, which is why the ones still running carry substantial desulfurization equipment. The whole Metroplex also sits inside an ozone nonattainment area, so permitting here is tighter than the Texas reputation suggests.
Control equipment sorts into two families. Wet systems run the gas against circulating lime or limestone and the sulfur leaves as a calcium solid in the blowdown. Injection and semi dry designs carry no circulation, putting dry reagent into the gas stream ahead of particulate collection. Neither tolerates reagent that varies, because removal efficiency simply follows the reagent and the continuous monitor keeps the record.
Preparation is the piece we manufacture. Weighing a charge rather than measuring its volume keeps slurry concentration fixed at the design figure, and because a single vessel handles either form of the material, a change in what shows up on the truck never becomes a capital project.
Lime Feed for Kiln Scrubbing
Lime Softening for Cooling Loads and Industrial Wells Across a Water Short Region
North Texas has never had abundant water and the demand curve keeps rising, which puts pressure on every plant to cycle its cooling towers harder and draw less makeup. The chemical consequence is unavoidable, because concentrating a loop concentrates the minerals in it, and hardness that was tolerable at three cycles becomes a scaling problem at six. Plants running their own wells into the Trinity aquifer start from a harder baseline still, and the food, beverage and manufacturing operations spread across the Metroplex all face some version of this.
Lime softening remains the sensible way to take the bulk out. The lime lifts pH, at which point the carbonate share of the hardness comes out of solution and magnesium leaves behind it as a hydroxide, with soda ash added wherever the noncarbonate share has to fall too. At temperature the reaction pulls silica down too, which is why hot process equipment holds its place ahead of higher pressure steam.
None of that stays predictable without reagent that stays the same. Tekkem equipment weighs each ingredient separately before the reaction, holds the charge at the temperature slaking requires to finish, and dilutes afterward to whatever working strength the process uses. A plant tightening its water balance needs a softener it can trust while the target keeps moving.
Why We Weigh Every Charge
pH Adjustment for Metal Finishing, Food Manufacturing, and Electronics Waste in Dallas County
The industrial corridor running through Garland, Mesquite and the southern part of Dallas County carries a dense concentration of job shop metal finishing, electroplating and heat treating, much of it serving the electronics and telecom manufacturing base that grew up along the Telecom Corridor in Richardson. Those operations generate acidic rinse water carrying dissolved metal, and none of it can leave the property in that state. Food and beverage manufacturing across the county contributes organically loaded effluent of its own, discharged under TCEQ within EPA Region 6.
Lime earns its place across all of them because a single addition does two jobs. Lifting pH returns a stream to its permitted range, and dissolved chromium, nickel, zinc or iron convert to hydroxides during the same movement and settle out for removal. What makes it awkward operationally is rhythm, since a plating line dumps on a shift schedule, a heat treat operation runs in campaigns, and a food plant's load follows production rather than the clock.
Dosing that adjusts on its own is what handles that. Feed is driven by the measurement the plant chooses, either flow or a concentration target, so the result holds while conditions change. Several treatment points share one circulating loop with individual metering, and slurry that never stops moving keeps those lines from silting closed.
Dosing Control Explained
What Actually Differs Between Two Lime System Quotes
Comparing lime system proposals is harder than it looks, because the headline capacity number is usually the least informative thing on the page. Two quotes claiming the same tons per day can behave nothing alike. The questions that actually separate them are how the equipment measures what it adds, what its accuracy looks like at the low end of its range rather than at design point, what sits inside the reaction vessel that will eventually need service, and who wrote the control code.
A few specifics are worth asking every bidder. Is lime metered by weight or by volume, and what happens to accuracy when material density changes between deliveries. How does the system respond when incoming water temperature drops. What is the turndown, and is stated accuracy maintained across it. How many moving parts are inside the tank, and what does replacing one involve. Whose panel is it, and can the supplier modify the program later or does that require a third party.
We are comfortable being measured against those questions because that is what the design was built around. A lower first cost that comes with volumetric metering, less turndown, or a subcontracted control package is a real option, and sometimes the right one, but it should be a decision made knowingly rather than one discovered two years into operation.
Specification Support Material
Fitting Lime Feed Into a Plant That Already Runs Other Chemicals
Lime is almost never the only reagent on an industrial site. Coagulant, polymer, acid, caustic and scale inhibitor are usually already in service, each with its own storage, metering and control, and a lime system arriving late into that arrangement has to coexist rather than take over. Sequence matters chemically as well, because adding lime before or after a coagulant changes the result, and a polymer dosed into a stream whose pH just moved will not perform the way the jar test suggested.
Physical arrangement carries its own constraints. Chemical buildings get crowded, containment is shared, and ventilation designed for liquid storage is not necessarily right for a dry material that generates dust and heat when it meets water. These are solvable problems, and they are far cheaper to solve on a drawing than after the concrete is poured.
Controls are where integration usually either works or does not. Feed equipment that reports into the plant's existing SCADA and takes its setpoints from the same place as everything else becomes part of the operation. Equipment that arrives with a standalone panel nobody else talks to becomes a system operators have to remember separately, and that is how a plant ends up running a chemical feed program out of two different places.
Systems in ServiceCompare Us Against the Alternative
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