Waste heat recovery systems for Flue gas and Exhaust air in Paper & Pulp Mills

Corrosion and fouling problems limit the recovery of more heat. With polymer heat exchangers you can recover additional heat and overcome these issues.

Improve thermal efficiency

Prevent Corrosion & Fouling

Get a Technical Assessment

15% of energy is lost via flue gas or exhaust air leaving your stack

What is keeping you from recovering this waste heat?

Availability of a robust solution?

Finding a technically feasible solution to recover and reuse waste heat is a challenge.

Corrosive and fouling flue gases?

When burning biogas from anaerobic waste water treatment or biomass, the flue gases are corrosive and fouling.

The business case?

The payback time of waste heat recovery options must be less than 5 years.

HeatMatrix engineers and manufacturers heat exchangers to recover industrial heat and improve energy efficiency for Paper & Pulp Mills

Save up to 10% energy on your thermal process

Recover waste heat - that is now lost - from flue gas or exhaust air

Your thermal process has waste heat recovery potential

Select your thermal process to find out how

Thermal processes

How waste heat recovery systems work

Capture waste heat

When hot flue gas and exhaust air leave the stack, they still contain a significant amount of energy. Our heat recovery system captures this heat from dryers, steam boilers, CHP systems, RTO’s and incinerators.

Preheat drying air, combustion air or water

Drying air, combustion air, process water, make-up water or boiler feed water are heated with the captured waste heat. This directly reduces the consumption of fossil fuels.

Our waste heat recovery systems for Paper & Pulp Mills

Polymer Air Preheater

Warm up combustion air or drying air by extracting heat from flue gas or exhaust air. The air preheater is corrosion resistant, easy to maintain and to clean.

Stainless Steel or Polymer Economiser

Warm up boiler feed water, make-up water or process water with waste heat from flue gases or exhaust air. The economiser is corrosion resistant and is easy to maintain and to clean.

Case study: Paper mill Europe

6% efficiency improvement

This paper manufacturer has the ambition to make their production processes more sustainable. Their steam boiler is being co-fired with biogas. Currently, heat recovery from the flue gas of this boiler is limited due to the potentially corrosive nature of the flue gas.

Conventional metal air preheaters are not suitable for deep cooling of flue gas because the acids in the flue gas will condense. A case study was prepared for the combination of a metal and polymer air preheater system. With this system, flue gas will be cooled down through the acid dew point to preheat the combustion air.

Combustion air will be preheated from 25 to 179 °C. The polymer air preheater part in the installed combination will make sure that there are no corrosion issues.

Your path to lower CO₂ emissions, energy consumption and costs

1

Technical assessment

Our process engineers assess the technical feasibility of additional heat recovery on your process. The potential reduction in CO₂ emissions, energy consumption and costs is determined.

2

Heat exchanger design and Business Case

A proposal is made that shows all technical details and an economic assessment with payback time. You have everything you need for approval to start a feasibility study.

3

Feasibility study

We or your preferred engineering company can perform a feasibility study to create the budget estimate you need to get management approval for CAPEX.

FAQ's

How to reduce energy in a Paper & Pulp mill?

In a Paper & Pulp plant, a number of thermal processes are in operation, such as steam boilers, CHP installations, Dryers, RTO's and incinerators. On these thermal processes high grade heat is lost through the stack via hot flue gas or dryer exhaust air. This can be as much as 15% of the primary energy usage. By recovering the heat from flue gas to preheat combustion or drying air, a significant reduction in energy and CO₂ emissions can be achieved. Alternatively, the waste heat can be used to warm up boiler feed or process water.

Payback time for waste heat recovery systems in a Paper & Pulp Mill?

Making the thermal processes more efficient reduces fuel consumption and therefore lowers fuel costs. Making the heat recovery system resistant to corrosion and fouling enables the mill to recover additional heat from their flue gas or dryer air, which will result in operational cost savings. Clients have improved their efficiency by 5 to 10% and achieved payback times of 3 to 5 years. Request a free Technical Assessment to get insight in your saving opportunities.

Technical assessment of waste heat recovery in your Paper & Pulp Mill

Our process engineers assess technical feasibility of additional heat recovery on your process. The potential reduction in CO₂ emissions, energy consumption and costs are determined.