Our oil/gas fired boilers can be divided into SZS water tube boilers and WNS fire tube boilers depending on the medium inside the tubes. With multiple pressure designs, the water tube boilers can meet the steam supply requirements of 2.5MPa or above. The fire tube boilers, on the contrary, are intended for use at pressures below 2.5 MPa. Fire tube boilers usually have a capacity of below 20t/h, while water tube ones of 20t/h or more as capacity expansion is possible. Gas-fired(oil-fired) Boilers WUXI ZOZEN BOILERS CO.,LTD. , https://www.cnzozen.com
More than 400 models of dryers are documented in the literature, of which more than 100 are commonly used. Due to the high latent heat of vaporization and due to the inefficiency inherent in hot air as the drying medium (most common), drying is made a unit operation that can be energy intensive compared to distillation. Research shows that in the United States, Canada, France, and the United Kingdom, industrial drying energy consumption accounts for 10% to 15% of the country's total energy consumption, while in Denmark and Germany up to 20% to 25%. (The latter data comes from the industry's mandatory energy audit and is therefore more reliable). This high energy consumption is the result of widespread application of drying operations in various sectors of the national economy. The energy needed in the drying process usually comes from the burning of fossil fuels, which will cause harm to the environment. With the prosperity of the global economy, the energy consumption needed for drying will increase accordingly, and the contradiction between drying and the environment will become more and more. obvious. Therefore, in order to ensure that within the constraints of the market economy, efforts must be made to improve the drying process and to reduce drying energy consumption as much as possible.
Drying technology innovation means that at least one of its attributes can replace the original product, operation, or method: a previously manufactured or invented product or method; higher productivity than the existing technology; better quality or better quality control Feasible, better effect; reduce environmental space occupied by equipment; safer operation; higher efficiency; lower total cost. The new technology can be the establishment of a new type of product, such as: microwave drying, dielectric drying and so on. It can also be a modest improvement of existing products and processes, such as: jet impingement drying, cyclone drying, etc.; is a major improvement of existing technologies, such as: organic superheated steam drying, desiccant drying and so on.
Desiccant drying refers to contact and adsorption drying. The principle of drying is based on the moisture transfer between the material to be dried and the solid capable of adsorbing moisture when in direct contact. This dry form contains two drying techniques. One is the typical contact drying: the evaporation of moisture here is at the expense of the heat transferred from the hot solid surface. The second is adsorption drying: the transfer of moisture here is driven by a mass concentration gradient. Due to the different interactions between the material and the adsorbent, the contact adsorption drying can be divided into two categories: inert adsorbent drying and active adsorption drying. Inert sorbents are solid materials that do not constitute the final product and are isolated after the drying process is complete. The active adsorbent can be an integral part of the final product and does not have to be isolated after the drying process has been completed. Due to the addition of desiccant, desiccant drying technology is superior to conventional convection drying in that it has good product quality, uniform quality, easy maintenance of biological activity, short drying time, low operating cost, simple system, relatively small equipment, and low civil construction investment. Etc. It is especially suitable for users who need to be small, mobile, or relatively insufficient in electricity. It is a kind of drying technology with promising development and can be widely used in chemical, food, medicine, textile, and biological industries.
Discussion on Application of Desiccant in Drying Industry
Drying is a very important and versatile unit operation in many industrial fields. Drying of materials often results from one or more of the following reasons: making the material flowable, easy to handle, easy to store and store, reduce transportation costs, and obtain desired product quality. There is a wide variety of materials that need to be dried. They require different drying times, each with different physical shapes and quality requirements. Improper drying can result in poor product quality and the product cannot be sold, resulting in irrecoverable losses.