Our Technologies

We will make the right choice of process for you based on the latest state of the art.

OUR TECHNOLOGIES

When planning new plants or improving old plants, many operators of incineration plants are confronted with the issue of the “correct” choice of a state-of-the-art process taking into account the local conditions.

For the separation of acid pollutants, generally three processes are available:

  • Wet flue gas cleaning (wet scrubbing)
  • Semi-wet/semi-dry flue gas cleaning (spray absorption)
  • Dry flue gas cleaning (dry absorption)

Depending on the task, these processes can also be used in combination with each other.

OUR TECHNOLOGIES

When planning new plants or improving old plants, many operators of incineration plants are confronted with the issue of the “correct” choice of a state-of-the-art process taking into account the local conditions.

For the separation of acid pollutants, generally three processes are available:

  • Wet flue gas cleaning (wet scrubbing)
  • Semi-wet/semi-dry flue gas cleaning (spray absorption)
  • Dry flue gas cleaning (dry absorption)

Depending on the task, these processes can also be used in combination with each other.

WET FLUE GAS CLEANING (WET SCRUBBING)

Scrubbers are used in wet flue gas cleaning for cleaning the flue gas. In the scrubbing zone, the pollutants contained in the flue gas are separated through an intensive contact with the scrubbing water by means of physical or chemical absorption.

In the first stage of wet scrubbing, primarily HCl, HF, mercury compounds, dust, heavy metals bound in particles and gaseous heavy metals are absorbed in the acid scrubbing water. In the second stage, primarily SO2 is absorbed in a suspension of lime hydrate or sodium hydroxide solution (NaOH).

Wet flue gas cleaning facilities are often completed by a preceding stage for dust separation upstream of the scrubber and a downstream super-fine cleaning stage for organic compounds and heavy metals.

Diagram of simple, waste-water free wet scrubbing:

WET FLUE GAS CLEANING (WET SCRUBBING)

Scrubbers are used in wet flue gas cleaning for cleaning the flue gas. In the scrubbing zone, the pollutants contained in the flue gas are separated through an intensive contact with the scrubbing water by means of physical or chemical absorption.

In the first stage of wet scrubbing, primarily HCl, HF, mercury compounds, dust, heavy metals bound in particles and gaseous heavy metals are absorbed in the acid scrubbing water. In the second stage, primarily SO2 is absorbed in a suspension of lime hydrate or sodium hydroxide solution (NaOH).

Wet flue gas cleaning facilities are often completed by a preceding stage for dust separation upstream of the scrubber and a downstream super-fine cleaning stage for organic compounds and heavy metals.

Diagram of simple, waste-water free wet scrubbing:

QUASI-DRY FLUE GAS CLEANING (SPRAY ABSORPTION)

For the quasi-dry (or semi-wet/semi-dry) flue gas cleaning, suspensions or solutions are distributed in the flue gas flow by means of a spray absorber with rotary distributor or two-component nozzles.

The acid flue gas components are absorbed in alkaline droplets with simultaneous water vaporization.

For the separation of organic pollutants and heavy metals, an adsorbent (e.g. coke dust) can be added upstream, in or downstream of the spray absorber.

The reaction products are separated in a downstream dust filter (fabric or electric filter).

Diagram of a simple spray absorption in the MKT process:

QUASI-DRY FLUE GAS CLEANING (SPRAY ABSORPTION)

For the quasi-dry (or semi-wet/semi-dry) flue gas cleaning, suspensions or solutions are distributed in the flue gas flow by means of a spray absorber with rotary distributor or two-component nozzles.

The acid flue gas components are absorbed in alkaline droplets with simultaneous water vaporization.

For the separation of organic pollutants and heavy metals, an adsorbent (e.g. coke dust) can be added upstream, in or downstream of the spray absorber.

The reaction products are separated in a downstream dust filter (fabric or electric filter).

Diagram of a simple spray absorption in the MKT process:

DRY FLUE GAS CLEANING (DRY ABSORPTION, CONDITIONED DRY ABSORPTION)

In the process of dry flue gas cleaning, the flue gas, if necessary, is moistened and cooled upstream of the actual reaction stage. This is done, on the one hand, for protecting the filter (temperature) and, on the other hand (if lime is used), for moistening the flue gas up to the dew point range.

In order to bind the pollutants contained in the flue gas flow, such as hydrochloric acid (HCl), sulphur dioxide (SO2), organic pollutants (e.g., PCDD/-DF, PCB) as well as ecotoxic heavy metals (e.g., mercury), in the downstream reaction line sorbents, such as NaHCO3 or lime hydrates and hearth furnace cokes are a metered addition.

The reaction products are efficiently separated by means of a downstream filter and recirculated, if necessary.

Diagram of a conditioned 2-stage dry absorption:

Schema einer (kond.) Trockenabsorption mit NaHCO3:

DRY FLUE GAS CLEANING (DRY ABSORPTION, CONDITIONED DRY ABSORPTION)

In the process of dry flue gas cleaning, the flue gas, if necessary, is moistened and cooled upstream of the actual reaction stage. This is done, on the one hand, for protecting the filter (temperature) and, on the other hand (if lime is used), for moistening the flue gas up to the dew point range.

In order to bind the pollutants contained in the flue gas flow, such as hydrochloric acid (HCl), sulphur dioxide (SO2), organic pollutants (e.g., PCDD/-DF, PCB) as well as ecotoxic heavy metals (e.g., mercury), in the downstream reaction line sorbents, such as NaHCO3 or lime hydrates and hearth furnace cokes are a metered addition.

The reaction products are efficiently separated by means of a downstream filter and recirculated, if necessary.

Diagram of a conditioned 2-stage dry absorption:

Schema einer (kond.) Trockenabsorption mit NaHCO3:

OUR LATEST METHOD OFFERS THE FOLLOWING POSSIBILITIES:

  • Single-stage dry method
  • Adherence to lowest limit values
  • Control over very extreme raw gas situations
  • Highest availability
  • Low-maintenance, safe technology
  • Further utilization of the flue gas heat
  • Increase in the overall plant efficiency

Interested? Then we are looking forward to speaking with you.

OUR LATEST METHOD OFFERS THE FOLLOWING POSSIBILITIES:

  • Single-stage dry method
  • Adherence to lowest limit values
  • Control over very extreme raw gas situations
  • Highest availability
  • Low-maintenance, safe technology
  • Further utilization of the flue gas heat
  • Increase in the overall plant efficiency

Interested? Then we are looking forward to speaking with you.

Contact us at any time!
We are happy to help!

Feel free to give us a call +49 (0) 201 / 4 37 83 – 0

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