ref: b application information. t g howell. alexandra …€¦ · eta hack vr bg3-500 biomass...

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APPLICATION INFORMATION Current P a g e | 1

APPLICATION INFORMATION. T G HOWELL. ALEXANDRA DOCK. Description of Process

This application is for the operation of 499Kw. ETA Hack VR BG3-500 biomass boilers used to dry virgin wood chip and fire wood at T G Howell & Sons Alexandra Dock site.

B.1.3. Site Maps

The site location is shown in Appendix B.1.3. (1). The location of the boilers and associated plant is shown in Appendix B.1.3. (2) The area which is the subject of this environmental permit application is outlined in red

B.2. Installation Detail

The two 499Kw. ETA Hack VR BG3-500 biomass boilers will be housed in a purposed built building approximately 40 meters x 20 meters x 6 meters high which will consist of a:

Plant Room & Fuel Store

Drying Floor

Dry Chip Store

Wet Chip Store

Elevated flues for dilution and dispersion of residual emissions. The boilers will be fuelled predominantly by chipped slab wood and occasionally virgin wood. The wood chip to be used in the boilers will be non-waste residue, virgin slab-wood sawn and chipped at our own facilities. No other lower grades of wood are permitted to be used to fuel the boilers. Hot water from the boilers travels through a heat exchanger to provide warm air for the drying of virgin wood chip and fire wood on the drying floor. The ETA Hack VR BG3-500 biomass boilers are controlled by a microprocessor touch control system, this ensure the boiler achieves the highest efficiency with the lowest emissions.

B.2.1. Boiler Operation The boilers to be used are two 499Kw. ETA Hack VR BG3-500 Boilers, located as shown on the site layout plan. Drawings of the boiler configuration are contained within Appendix III. Wood is to be transferred to the floor agitator fuel feed system by a rubber wheeled shovel tele-handler. There is a continuous feed to the boilers, each boiler is continuously loaded at a maximum rate of up to 153 kg/h, generating up to 499KW of renewable heat each for use on-site. The boilers are modulated to meet demand but are designed to be operated continually, which minimises the number of start-up's and shutdowns required Residual exhaust emissions from the boilers are released via an elevated flue. Waste ash arising from the boilers will be collected in enclosed vessels, it is intended that this ash will be sold through our outlets as a fertilizer

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B.2.1. Wood Fuel Reception, Storage and Processing The chipped wood will be delivered in from our other site on our own transport A visual inspection of the wood is undertaken to ensure to is of the correct grade, if not it will be rejected. The wood is stored within a purposed designed, enclosed building (wet chip store), which is to be fitted with roller shutter doors. Within this area, the wood is moved to the drying floor bay area to be dried when dried it is moved to the dry chip store area When required the dried chip will be loaded into the floor agitator fuel feed system to be feed automatically into the boilers.

B.2.1. Plant and Machinery

In addition to the boilers and building, there is no additional plant require for the operation other than what is on site currently.

B2.2. Potential Atmospheric Emissions and Controls

The main potential sources of air emissions have been identified as follows:

Residual emissions from the two flues serving the biomass boilers; and,

Fugitive dust from handling, processing and storage of wood.

The biomass boiler flue locations (No:1 and No: 2) are shown on the site infrastructure Plan in Red (Ref B.1.3.(2). The flues will be 8 meters in elevation.

Biomass Boiler Flue Emissions See attached Renewable Heat Incentive (RHI) Emissions Certificate Appendix: ofgem e-serve Tests show that emissions from the plant were no greater than 30 g/GJ, PM and 150 g/GJ, NOx. Measured Emissions of PM, ave of 7g/GJ net heat input Measured Emissions of NOx, ave of 64g/GJ net heat input

Wood Chip Delivered to Wet Storage

Area

Transfer from Wet Storage/Area to Drying Floor

When Dry Transfer to Dry Storage Area

Wood Chip To Be Used To Fuel

Biomass Boilers

Fire Wood Retailed Through

Our Premises

PLANT PROCESS

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B2.3 The following abatement methods will be used to control emissions from the biomass

boilers: The boiler control software will monitor efficiency and emissions through lambda and

combustion chamber temperature regulation, this will achieve the highest efficiency with the lowest emissions. Multi –Cyclone, the multi - cyclone separates coarse dust through rotation, thus lowering the dust emission values. In addition to the physical abatement methods used, regular servicing and preventative maintenance will be undertaken on the boiler to maintain efficient boiler operation. This will include the following methods/procedures: Cleaning in accordance with manufacturer specification/instruction; Bi-annual boiler services.

Fugitive Dust Emissions There is potential for dust emission to arise as a result of the proposed activities, as follows:

• Fugitive dust emission from HGVs transferring to the fuel storage; • Fugitive dust from wood storage and processing area.

A series of dust mitigation measures will be implemented on site to ensure dust emissions are controlled as far as is practically possible. The measures include:

• Enclosure of wood processing operation to prevent fugitive emission; and, • Delivery will be in enclosed vehicles • The wood storage and processing area is enclosed to minimise risk of fugitive

dust emission. B.2.5 Emissions Monitoring

The boiler has a valid RHI Emissions certificate, which states that the boiler operates well under the excepted emissions limit. Visual Monitoring of Stack Exhausts Emissions from the combustion process should be free from visible smoke. All emissions from air should be free from droplets and persistent visible emissions. Stack emissions will be visibly monitored on an ongoing basis by site staff. A complaints procedure will be implemented during the day to day operation to ensure full investigation and remedial action for air emission related issues. Visual Monitoring Site operatives will continuously monitor dust emissions whilst the site is in operation and will report back to the site supervisor for advice if required. Given that the wood processing operations are to be enclosed, no dust issues are anticipated in terms of fugitive dust from processing operations.

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B.2.6 Environmental Management Systems Existing management systems of T G Howell & Sons that are in place for our existing LAPPC Permit, provides demonstration of the competence of the site operator. Our current Environmental Management System (EMS) will be amended to cover the day to day operation of the biomass boilers to ensure compliance with the Environmental Permit.

B.3 Impact on Environment B.3.1. Due to the location of the site within an industrial area any impact on the surrounding

area would be minimal due to the technology of the plant and controls on the site B3.3 Due to the location of the site within an industrial area and the distance from the

SSSI site any impact on the surrounding area would be minimal due to the technology of the plant and controls on the site

B4. Environmental Statements

None B5. Additional Information

None

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Site Plan. T G Howell & Sons Alexandra Dock

Appendix Ref B.1.3. (1).

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PLANT PLAN. T G HOWELL & SONS ALEXANDRA DOCK

Appendix Ref B.1.3. (2).

KEY:

External Emission Points to Atmosphere 1 2

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Appendix Ref SSSI (1).LOWER USK

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Appendix Ref: ofgem e-serve

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ref: b application information. t g howell. alexandra …€¦ · eta hack vr bg3-500 biomass...

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