AL-Top Fine Particle Filter

The Schräder AL-Top is an innovative fine-particle filter for solid-fuel combustion systems based on the principle of corona discharge. The particle emissions that occur during the combustion of wood pellets or wood chips are electrostatically charged as they enter the AL-Top and therefore accumulate on the filter. The cleaning of the filter is fuly automatic; sensors detect the level of particles and initiate cleaning when necessary. Where the AL-Top can be used: Because of its compact design, the Schräder AL-Top is suitable for new build and retro-fit installations. The filter unit generates a very low pressure drop, thereby ensuring optimum operation conditions for biomass boilers. Advantages: •Simple, compact design •Low energy consumption •High capacity filtration performance - up to 82% separation, according to the German Biomass Research Centre (DBFZ) •High degree of automatic operation, including automatic cleaning •Can be retrofitted •Limited pressure losses •Low wear, low maintenance •Power value - currently up to 300kW •installation of multiple units (for larger boilers) possible

Heat Exchangers

AWT-TOP The AWT-Top is a system for heat recovery from flue gasses. Under some circumstances, direct integration without the buffer storage is workable - the precipitated condensate can be collected, neutralised or, where possible directly introduces into the cooling circuit. This flue gas cooling system is equally suitable for heat recovery in the cases of gas or oil-fired boilers, or for industrial flue gases. The Problem Biomass is becoming the fuel of choice for industrial processes, as fossil fuel prices increase and political pressure on gas supplies become more restrictive. However, it remains true that it is barely possible, as yet, to utilise fully the fuel value of wood and plant-based fuels safely. Biomass boilers require high return temperatures if corrosion to the structure of the boiler is to be avoided. In practice, optimum fuel value utilisation is impossible. Biomass fuels like wood chips, with a high moisture content, are well suited to fuel value utilisation. Common sense therefore says that the market needs a system that makes possible efficient use of biomass wood chip fuels. Possible solution Biomass combustion takes place at higher temperatures than those of other fuels, and that produce higher temperature flue gases than those resulting from fossil fuel combustion. A cleverly designed system of two heat exchangers can achieve the greatest cooling of the flue gases, and therefore the greatest heat recovery. In the first flue gas heat exchanger, the flue gases that have a temperature, in normal operation, of between 130 - 300°C, are cooled to a temperature barely above the dew point (50 - 90°C). This phase of the heat recovery is used to heat the return line of the heating system. The second heat exchanger then cools the flue gas further, causing it to condense more moisture, reducing the potential for corrosion of the boiler. This is possible because of buffer storage, consisting of a water-filled coil, which is heated by the heat exchanger. The stored energy is then used each time water is drawn from the system. AWT The AWT heat Exchanger reduces your process operating costs and provides heating for surrounding areas. The heat exchanger is designed for selective heat extraction from product systems, such as annealing furnaces or bakery ovens and their flues. If no heat is required from the system, the bypass motor is activated to bypass the heat exchanger. The heat exchanger can recover enough heat to heat a warehouse or offices within the same building. Even the complete hot water requirement of a building can be provided. The AWT Heat Exchanger is manufactured from high-grade stainless steel (1.4571/1.4404), a stainless steel that has been used in high technology flue gas appli-cations for several years. For high stress applications, a version of the AWT made from 1.4539 is available. For applications involving extremely high flue gas temperatures: An AWT Heat Ex-changer fabricated in stainless steel 1.4828, which has a high nickel content, can be supplied. Even retrospective installation of an AWT Heat Exchanger can be cost-effective, particu-larly in high energy costs, so that pay-back ion two or three years can be achieved.

Energy and Environmental Solutions for your Bakery

SWT Steam Heat Exchanger The baking trade is a very energy-intensive industry. Therefore, there is a great potential for savings. One of the possibilities is, for example, recovering heat from the baking steam. Solely for this purpose, Schräder has developed a steam heat exchanger with plain pipes, with which it is possible to recover the high condensation heat of the water vapour. The steam heat exchangers are manufactured from high-quality stainless steel V4A material. The steam heat exchanger operates most effectively with a high concentration of water steam and a low cooling water temperature. The connection of several ovens to a Schräder steam heat exchanger is a proven system that has often been put into practice. Please contact our technical team for the op-timal sizing of your steam heat exchanger. Schräder steam heat exchangers are characterised by their very low flow resistance, which enables operation without the support of an additional fan. The steam heat exchangers are not suitable for flue gas; please see our range of highly effective flue gas heat exchangers. FUTUREaero - STEAM FANS FOR THE BAKERY The steam fan was developed specifically for bakeries and provides better ventilation of the water vapour when opening the baking chamber door. This prevents hot vapours from being released when opening the baking chamber. Owing to the high-quality stainless steel the fan has a high level of corrosion resistance and is, therefore, ideally suited for acidic steam. The housing design enables optimal flow properties in the smallest possible space. Since the fan is offered in both straight and angled versions and as several condensate drains are present, its installation is flexible and can be retrofitted in almost all bakeries. Thereby, it is integrated into the steam exhaust duct. Owing to the well thought-out design the fan works reliably, quiet and maintenance-free. However, if there should be a failure, the exhaust air can still pass through. The benefits at a glance: • high corrosion resistance • easy assembly • space-saving construction • maintenance-free • high temperature resistance Perfectly matched components guarantee best functionality and maximum efficiency for any requirements.

Exhaust Technology / Wall Bushing

Schräder Exhaust Technology - the new exhaust technology in all its variety. Schräder offers an array of products with special systems to suit individual requirements. Perfectly coordinated components guarantee optimum functionality and highest efficiency: Chimney systems for standard heating appliances in the positive pressure and negative pressure areas, single-walled or double-walled, deployable both indoors as well as outdoors - for firing with split logs, wooden pellets, combined heat and power unit (CHP), oil or gas. Schräder Wall bushing The safest way of wall and ceiling bushing, ideally for all wooden houses: The round wall bushing with highest safety made by Schräder. Wooden houses are or become more and more popular. Of course the fire protection regulations have to be obeyed carefully. Special protection measures are required if a boiler or an oven has to be installed. In order to insert those wall bushings easily and safely Schräder has developed a new wall and ceiling bushing. This bushing is used where the waste gas pipe has to be mounted through inflammable materials. This bushing is equipped with a novel glass fibre insulant with a multiple better insulation than conventional material (mineral wool). The special composition allows the reduction of the distance ti inflammable parts to 80 mm compared to the standard 200 mm. For installation a hole has to be cut into the wooden wall. Then the wall bushing will be inserted and fixed. The bushing will be covered by a front panel made of Vermiculit which serves as heat protection and radiation blind. A stainless steel blind which covers the waste gas pipe totally completes the wall bushing. The wall bushing made by Schräder is available for nominal chimney diameters from 130 to 200 mm and for wall thicknesses 0f 12, 24 and 36 cm. It is certifies by the Deutsches Institut für Bautechnik in Berlin (certificate number Z-7.3-3408) and offers therefore proofed safety.