{"id":19954,"date":"2024-05-01T08:00:15","date_gmt":"2024-05-01T06:00:15","guid":{"rendered":"https:\/\/www.icicaldaie.com\/news\/industrial-steam-boilers-how-to-choose-the-right-one\/"},"modified":"2024-05-07T08:19:55","modified_gmt":"2024-05-07T06:19:55","slug":"industrial-steam-boilers-how-to-choose-the-right-one","status":"publish","type":"news","link":"https:\/\/www.icicaldaie.com\/en\/news\/industrial-steam-boilers-how-to-choose-the-right-one\/","title":{"rendered":"Industrial steam boilers: How to choose the right one?"},"content":{"rendered":"

What’s an industrial steam boiler?<\/h2>\n

In order to be able to choose from among the various machines available, one must first understand how they\u2019re built and how they work.<\/p>\n

Let\u2019s start with the basics.<\/p>\n

steam boilers are generally made up of 2 main components: the burner and the boiler body.<\/p>\n

The boiler body itself is made up of a combustion chamber and tube bundles, which follow various pathways depending on the applications.<\/p>\n

Depending on whether combustion flue gas or water flows through these tube bundles, the unit is classified as either a fire tube or water tube steam boiler.<\/p>\n

In addition to these two categories, there are also many others, which even include smaller products for domestic use.<\/p>\n

This article will discuss steam boilers for industrial use, which are extensively used for a wide range of applications in production lines all around the world.<\/p>\n

Table of Contents:<\/h2>\n
    \n
  1. The main parameters for choosing a steam boiler<\/a>
    \na.     Steam flow rate and maximum available pressure<\/a>;
    \nb.     Efficiency, in terms of electricity and natural gas consumption<\/a>;
    \nc.     System emissions<\/a>;
    \nd.     Daily management and maintenance<\/a>;
    \ne.     Water treatment<\/a>.<\/li>\n
  2. Conclusions<\/a><\/li>\n<\/ol>\n

    1. The main parameters for choosing a steam boiler<\/h2>\n

    In an effort to provide more specific numerical indications, we have examined various cases in which fire tube steam boilers are utilized, given their widespread use throughout the industrial world.<\/p>\n

    As previously mentioned, steam boilers are comprised of a burner and a boiler body.<\/p>\n

    \"\"<\/p>\n

    The burner is inserted into the combustion chamber and controls the flame, where hot flue gas travels through the boiler body\u2019s tube bundles in order to heat the surrounding water.<\/p>\n

    The pathways of the tube bundles vary depending on the application, providing different performance levels.<\/p>\n

    Now then, let\u2019s take a look at the main parameters to take into consideration when choosing a steam boiler.<\/p>\n

    The most important are the following:<\/p>\n

      \n
    1. Steam flow rate and maximum available pressure;<\/li>\n
    2. Efficiency, in terms of electricity and natural gas consumption;<\/li>\n
    3. System emissions;<\/li>\n
    4. Daily management and maintenance;<\/li>\n
    5. Water treatment.<\/li>\n<\/ol>\n

      a. Steam flow rate and maximum available pressure<\/h3>\n

      Let\u2019s begin with the most simple and trivial technical characteristics.<\/p>\n

      Based on your production plant\u2019s needs, you will likely have already determined its daily steam requirements in terms of both pressure and flow rate.<\/p>\n

      Starting with these values, and adding a safety margin (20-30% is recommended), we can obtain the necessary flow rate and pressure values.<\/p>\n

      Each boiler model taken into consideration must comply with these parameters.<\/p>\n

      The calculation of the pressure values and flow rates required of the steam boiler becomes increasingly crucial as the system\u2019s complexity increases.<\/p>\n

      In fact, while the steam flow rate and pressure value calculation are rather simple for a small dairy that only uses steam for pasteurization, it becomes more complex when other needs have to be met, like heating ovens, humidification, and system sterilization.<\/p>\n

      \"\"<\/p>\n

      b. Steam boiler consumption<\/h3>\n

      Together with the initial cost of a new system, it\u2019s operating and maintenance costs are certainly the second most important aspect.<\/p>\n

      In order to clarify what this means, we studied a number of our steam boilers used by different companies for various applications over the course of 10 years.<\/p>\n

      We added up all the costs incurred over that 10-year period for the initial purchase, installation, natural gas and electricity consumption, and maintenance interventions.<\/p>\n

      The analysis showed that the boiler\u2019s initial cost was less than 10% of the entire cost of the system (a figure that grew progressively smaller the longer the system was in service).<\/p>\n

      The majority of the costs were due to natural gas and electricity consumption and maintenance.<\/p>\n

      \"\"<\/p>\n

      This reveals why it is so important to decrease these cost items as much as possible.<\/p>\n

      Let\u2019s begin with the largest items, or rather the cost of natural gas and electricity.<\/p>\n

      In order to estimate electricity consumption, it is necessary to analyze the installed power, normally expressed in kilowatts (kW), and to multiply it by the estimated time of use, and, finally, the average cost per kW\/h.<\/p>\n

      This would be the case if we were to hypothesize the boiler\u2019s constant use at maximum power, so the data must then be broken down based on the boiler\u2019s actual everyday use.<\/p>\n

      When calculating natural gas consumption, on the other hand, it is best to start with the desired steam output, for example, 1 tonne per hour.<\/p>\n

      Knowing the boiler\u2019s efficiency and the heat needed to bring the water to a temperature of 80 degrees with steam at 10 bar, we can calculate the total amount of heat necessary, and therefore the amount of gas necessary.<\/p>\n

      \"\"<\/p>\n

      As you can see from the simplified formula, the boiler\u2019s efficiency plays a fundamental role.<\/p>\n

      For the sake of simplicity, we have calculated the volume of natural gas necessary hypothesizing the boiler\u2019s use at 100%.<\/p>\n

      However, steam boilers often operate at variable outputs, depending on the load required.<\/p>\n

      The efficiency values shown on the technical data sheets refer to maximum load conditions, but they change progressively based on the output dispensed.<\/p>\n

      The daily and seasonal load conditions must, therefore, be taken into consideration when evaluating the boiler\u2019s efficiency.<\/p>\n

      \"\"<\/p>\n

      If the steam requirements vary significantly within the span of 24h, it becomes important to have a modulating burner capable of adapting to the various conditions, while at the same time maintaining good efficiency.<\/p>\n

      In short: Electricity and natural gas consumption are two important cost items.
      \nFor each of these two items, calculate how much the new system can make you save, and how. Afterward, compare the data of the various manufacturers, and choose the model that guarantees you the best-operating conditions, and therefore savings, for your daily use.<\/p>\n

      c. Steam boiler emissions<\/h3>\n

      A third aspect that\u2019s becoming increasingly important is atmospheric gas emission limits.<\/p>\n

      Much like cars, boilers are also subject to increasingly strict regulations in terms of emissions.<\/p>\n

      And in this case, as well, the problematic gas types are nitrogen oxides (NOx).<\/p>\n

      The limits, which were previously broken down based on the region of provenance, have now been unified under a single nationwide limit of 100 mg\/Nm^3.<\/p>\n

      This limit only refers to industrial thermal systems and does not retroactively apply to previously installed boilers.<\/p>\n

      And while this is the Italian limit, it should be kept in mind that the various countries around the world have even more restrictive limitations due to the harmfulness of these gases.<\/p>\n

      California and China, for example, will impose maximum limits of 25-30 mg\/Nm^3 in the coming years.<\/p>\n

      The limits that China and California have imposed upon themselves are derived from the technologies currently available on the market.<\/p>\n

      Given the products present on the market, anyone looking for a new steam boiler should certainly take emissions into account, in order to protect the environment as much as possible.<\/p>\n

      d. Daily management and maintenance<\/h3>\n

      Once the boiler has been chosen and installed, the \u201cproblem\u201d of its daily management arises.<\/p>\n

      As you certainly already know, steam boilers are pressurised machines that require constant supervision.<\/p>\n

      This supervision must be provided by an operator who has received specialized training on the boiler\u2019s management.<\/p>\n

      One way to decrease the operator\u2019s workload is to have the boiler certified for continuous unsupervised operation for 72h.<\/p>\n

      Another way to simplify the daily management of a heating plant room is through the use of connectivity.<\/p>\n

      In fact, many boilers are equipped with numerous sensors to monitor their performance parameters, and these can be sent to a remote server via an Internet connection, where they can be independently viewed by the system\u2019s manager.<\/p>\n

      And if this aspect is combined with the possibility of controlling these parameters remotely, the time required for daily management decreases even further.<\/p>\n

      But in addition to the boiler\u2019s daily management, maintenance must also be taken into consideration.<\/p>\n

      \"\"<\/p>\n

      And while it\u2019s difficult to come up with a precise estimate of the maintenance costs, you can, however, get a general idea.<\/p>\n

      For example, some companies offer ordinary service contracts for new boilers, while other local service centers offer practical spare parts kits to be kept on hand.<\/p>\n

      It is also recommended to check the origins of any pumps, sensors, and valves, and to only choose those from reliable and well-known manufacturers.<\/p>\n

      In terms of both ordinary management and maintenance, having an electronic control system connected to the Internet certainly facilitates work activities.<\/p>\n

      Once again, be sure to check that the new boiler is connected to the Internet and that the manufacturer can even provide support remotely by directly accessing the boiler\u2019s controls.<\/p>\n

      This facilitates the interactions between the 2 parties\u2019 technicians and limits the intervention time necessary to resolve any problems.<\/p>\n

      e. Water treatment<\/h3>\n

      One last important aspect regards the treatment of the water.<\/p>\n

      In fact, it\u2019s important to continuously monitor the water\u2019s parameters and to ensure that they are consistent with those required by the manufacturer.<\/p>\n

      The water must be devoid of salinity to avoid scale build-ups, dissolved gases to eliminate the risk of corrosion, and organic substances to prevent the formation of foam and deposits.<\/p>\n

      The less salinity and dissolved gases present in the water, the longer the boiler will remain in function and the less maintenance will be required.<\/p>\n

      Every steam boiler manufacturer installs different water filtering and blowdown systems.<\/p>\n

      Specific information must be requested in this regard during the purchasing phase in order to ensure that these systems constantly monitor the water, prevent needless waste, and, if possible, are connected to the Internet.<\/p>\n

      Waste is most likely to occur via the blowdown systems.<\/p>\n

      In fact, these systems eliminate the water from the boiler body in order to allow any salt deposits on the surfaces and the bottom to be removed.<\/p>\n

      In doing so, the blowdown systems discharge numerous liters of water that has already been treated and, above all, has already been heated.<\/p>\n

      This naturally has an impact on the system\u2019s overall efficiency.<\/p>\n

      It is therefore recommended to check the types of blowdown systems that are utilized and the amount of water that is eliminated every day in order to determine which system wastes the least.<\/p>\n

      Conclusions<\/h2>\n

      In this article, we examined the most important parameters to be taken into consideration when purchasing a new boiler.<\/p>\n

      Let\u2019s go over them once again briefly.<\/p>\n

      It is first necessary to evaluate the production system\u2019s daily and seasonal requirements in terms of both steam flow rate and pressure.<\/p>\n

      In order to improve the system\u2019s efficiency, it is necessary to calculate requirement curves that are as accurate as possible.<\/p>\n

      The most suitable boiler can be chosen based on the trends.<\/p>\n

      When choosing a boiler, it\u2019s important to keep in mind that the initial investment (purchase cost) only represents a small portion of the overall costs that will be incurred throughout its lifetime.<\/p>\n

      In fact, the greatest savings can be obtained by taking the boiler\u2019s entire lifespan into account.<\/p>\n

      In the end, the best efficiency and savings can be obtained by considering the electricity and natural gas consumption parameters, as well as the daily management and maintenance costs.<\/p>\n

      While a certain system, valve, pump, or burner may seem somewhat costly, it could provide for slightly better efficiency, which, over the long-term, translates into continuous savings.<\/p>\n","protected":false},"excerpt":{"rendered":"

      What’s an industrial steam boiler? In order to be able to choose from among the various machines available, one must first understand how they\u2019re built and how they work. Let\u2019s start with the basics. steam boilers are generally made up of 2 main components: the burner and the boiler body. The boiler body itself is […]<\/p>\n","protected":false},"author":2527,"featured_media":19356,"template":"","class_list":["post-19954","news","type-news","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nIndustrial steam boilers: How to choose the right one? - ICI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.icicaldaie.com\/en\/news\/industrial-steam-boilers-how-to-choose-the-right-one\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Industrial steam boilers: How to choose the right one? - ICI\" \/>\n<meta property=\"og:description\" content=\"What’s an industrial steam boiler? In order to be able to choose from among the various machines available, one must first understand how they\u2019re built and how they work. 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