What factors need to be considered in customizing the ventilation duct of winery workshop?

When customizing the ventilation duct of the brewery workshop, it is necessary to comprehensively consider the environmental characteristics, ventilation requirements, regulatory requirements and other factors of the brewery workshop to ensure the efficient, safe and stable operation of the ventilation system. The following is a detailed introduction:

Workshop environment and layout

Space size: determine the overall size and layout of ventilation ducts according to the area and height of the workshop. Large-area and high-space workshops may need more and larger-diameter ventilation pipes to ensure adequate ventilation.

Equipment location: Brewing equipment, fermentation tanks, etc. usually emit a lot of heat and harmful gases, so the suction port of ventilation pipeline should be set near these equipment to collect and discharge waste gas in time and effectively. At the same time, it is necessary to avoid the influence of ventilation pipes on the operation, maintenance and transportation channels of equipment.

Building structure: Considering the building structure of the workshop, such as the position of beams and columns, wall materials, etc., rationally plan the direction and installation method of ventilation pipes, minimize the bending and obstruction of pipes, and reduce ventilation resistance. For workshops with special structures or requirements, such as color steel structure workshops, attention should be paid to the fixing and sealing of ventilation pipes to prevent air leakage.

Ventilation demand

Ventilation calculation: accurately calculate the required ventilation according to the characteristics of brewing technology, the number of equipment, the number of workers and the amount of harmful gas produced in the workshop. Generally speaking, the ventilation volume of the winery workshop should meet the requirements of several times of air exchange per hour to ensure that the concentration of harmful gases does not exceed the safety standards. For example, in areas where flammable and explosive gases such as ethanol exist, the ventilation volume should meet the requirements of relevant safety regulations to ensure that the gas concentration is lower than the lower explosion limit.

Air distribution: A reasonable air distribution form is designed, so that fresh air can be evenly distributed to all areas of the workshop, and at the same time, waste gas can be effectively discharged. The common air flow organization modes are upper delivery and lower discharge, lower delivery and upper discharge, side delivery and side discharge, etc. For the brewery workshop, because harmful gases and heat are mostly concentrated in the upper part of the workshop, fresh air can be sent in from the lower part of the workshop and waste gas and hot air can be discharged from the upper part of the workshop.

Gas properties and concentration

Composition: The gas composition in the workshop of the winery is complex, mainly including ethanol, carbon dioxide, water vapor and a small amount of organic acids. Different gases have different properties, so the material and design requirements for ventilation pipes are also different. For example, ethanol is corrosive to a certain extent, and the ventilation pipes should be made of corrosion-resistant materials; The density of carbon dioxide is higher than that of air, so its accumulation characteristics should be considered when designing ventilation system, and the position of exhaust port should be set reasonably.

Concentration: According to the concentration of harmful gases in the workshop, determine the ventilation times and ventilation volume of the ventilation system. If the concentration of harmful gases is high, it is necessary to increase the ventilation volume and air exchange times to ensure that the air quality in the workshop meets the safety standards. At the same time, according to the distribution of gas concentration, ventilation pipes and tuyeres should be arranged reasonably to ensure effective ventilation in high concentration areas.

Fire and explosion protection requirements

Material selection: The winery is a flammable and explosive place, and the ventilation pipes should be made of incombustible or nonflammable materials, such as galvanized steel plates and stainless steel plates, so as to prevent the ventilation pipes from becoming a channel for fire spreading when a fire occurs. For areas with special fire protection requirements, measures such as fire protection coating or fire protection package can also be adopted.

Static elimination: flammable and explosive gases such as ethanol are prone to generate static electricity during ventilation, which may cause explosion when accumulated to a certain extent. Therefore, measures should be taken to eliminate static electricity in ventilation pipes, such as installing electrostatic grounding devices, selecting antistatic pipe materials or installing electrostatic eliminators in the pipes to ensure the safe operation of the ventilation system.

noise control

Equipment selection: The fan in the ventilation system is one of the main noise sources. When selecting the fan, the low-noise fan model should be given priority, and the fan should be reasonably matched according to the ventilation volume and pressure requirements to avoid the additional noise caused by the operation of the fan in the inefficient area.

Pipeline design: design the direction and layout of ventilation pipeline reasonably, reduce the bending and diameter change of pipeline, and reduce the noise caused by airflow impact and vibration. At the same time, muffler, muffler elbow, sound insulation cotton and other noise reduction materials can be installed on the ventilation pipeline to effectively control the noise and ensure that the noise level in the workshop meets the occupational health standards.

Maintenance and cleaning

Easy disassembly: The ventilation duct should be designed to be easy to disassemble and assemble, which is convenient for regular internal inspection, cleaning and maintenance. For example, flange connection or quick-assembly joint is adopted to facilitate the disassembly and replacement of the pipeline.

Cleaning port setting: set a reasonable cleaning port on the ventilation pipeline to facilitate the use of professional cleaning equipment to clean the inside of the pipeline. The position of the cleaning port shall be convenient for operation and shall not affect the normal operation of the ventilation pipeline. At the same time, the sealing performance of the cleaning port should be considered to prevent air leakage.

Cost and budget

Initial investment: including material cost, equipment cost, installation cost, etc. On the premise of meeting ventilation requirements and safety standards, appropriate materials and equipment should be selected according to the budget, the design scheme should be optimized, and the initial investment cost should be reduced. For example, for some non-critical ventilation pipes, materials with high cost performance can be selected.

Operating cost: consider the long-term operating cost of ventilation system, such as energy consumption of fans and maintenance cost of equipment. Select efficient and energy-saving fans and equipment, reasonably design the operation mode of ventilation system and reduce the operation cost. For example, the frequency conversion fan is used to automatically adjust the fan speed according to the actual ventilation demand in the workshop to reduce energy consumption.