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I. The significance of biomass gasification technology. Biomass gasification technology is a process that uses low-quality biomass as raw material to convert it from a solid state into combustible gas. Low-biomass materials mainly consist of crop straws, and corn cobs, wood chips, and firewood can also be used. Due to the low renewability of biomass, the energy generated from this resource is referred to as renewable energy. The applications of biomass gasification technology are the same as those of city pipeline gas; it features stable combustion and high thermal efficiency, and is suitable for cooking, heating, boilers, etc. The application prospects of this technology in rural areas are extremely broad. It met the requirement of \"one person lighting the fire, with the whole village using gas\". Our country is a major agricultural nation, producing around 700 million tons of crop straws each year. Apart from a small portion that is used for livestock farming, the vast majority of this resource is wasted through direct burning, which not only results in a waste of resources but also causes environmental pollution. Therefore, making rational and effective use of this resource is a matter of great benefit to the country and its people. The agricultural crop straws generated in our country each year are equivalent to about 3.5 tons of standard coal. Making full use of this resource brings significant social and economic benefits, as it helps to conserve resources and protect the environment; it also changes the traditional cooking methods in rural areas and promotes the development of related industries. II. Introduction to biomass gasification units A biomass gasification unit is a system in which biomass undergoes a combustion reaction under oxygen-deficient conditions within a container. Thus, the conversion of energy from solid to gas state is completed. Most of the energy in the straw is converted into gas; this is the gasification process. The design of such reactors usually includes top-fed and bottom-fed types, with the gas produced by the top-fed type generally being at a higher pressure than that produced by the bottom-fed type. The biggest drawback of the upward suction type is its inability to supply material continuously, and the gas produced by the generating furnace is also unstable. So we generally use the downward suction type. The downward absorption reaction is stable, allowing for continuous feeding. The main unit of the plant consists of two parts; the first part is the gasification furnace (including the feeder) ； The second part is the gas purification unit. The device is composed of three parts ； 1. Gas cooling and purification unit; 2. Unit power source – water ring vacuum pump, which provides the power for the mixed gas-water operation within the unit. 3. Tar separator, which is also a gas-water separator. III. Introduction to biomass gasification projects: The straw gasification project, from the gas generator unit to the end users, consists mainly of the following three parts. The first part is the gas generator set, whose structure consists of three main components: 1. The feeding section. The straw that has been crushed to meet certain requirements is fed into the gasification furnace via a feeder. Feeding machines typically use sealed augers. The opening and closing of the feeding machine can enable automatic material discharge according to the material requirements of the shaft furnace. 2. Gasifier. That is, the gasification chamber, where the crushed straw undergoes controlled combustion and reduction reactions. The gas produced by a producer furnace contains large amounts of tar and ash, and it needs to be purified. 3. Purification of gas. It primarily removes tar and ash from gases, ensuring they meet the **standard of <10 mg/m3**. The purification system consists of three stages: gas cooling, water purification, and tar separation. Part Two: Gas holder. It is a device for storing gas, primarily used to regulate the balance between the production and supply of gas. The structures of gas storage tanks include external guide rail vertical type, external guide rail-free vertical type, and spiral guide rail type. The volume of the gas storage tank is determined based on the user’s total daily gas consumption; generally, the capacity of the storage tank should account for 40% to 50% of the total daily gas supply. There are three ways to express the volume of a gas holder: geometric volume, effective volume, and nominal volume.