4 Technical and economic analysis and socio-economic benefit analysis
4.1 Technical and economic analysis The main units of domestic thermal power generation have increased from 200MW to 300MW and 600MW, and the parameter level has developed from ultra-high pressure and subcritical to supercritical and ultra supercritical. The main problem of the boiler, steam turbine body and pipeline drain valve under the existing domestic technical conditions is internal leakage. High grade working medium goes directly to the low end without doing work, resulting in a large amount of heat loss. The metal pneumatic ball valve developed in this project can well solve this problem with its excellent sealing performance, special structure and excellent durability.
4.2 In terms of economic benefit analysis, only energy consumption is saved, and the comprehensive application of this product can save 5 million yuan of standard coal for Liaoning Huadian Tieling Power Generation Co., Ltd. every year; It is popularized and used in the power industry, and 600 sets of high-temperature and high-pressure metal seat pneumatic ball valves are produced every year, which can achieve a sales income of 9 million yuan and a profit of 2 million yuan; As the cost is reduced, the application scope will be expanded accordingly, which can indirectly create more benefits for the society.
4.3 The overall fund demand of the project to solve the problem of scientific research funds is 4 million yuan, of which 3 million yuan is self raised, accounting for 75% of the total funds, and 1 million yuan is applied for special funds, accounting for 25% of the total funds. The special funds applied are mainly used for the optimization and transformation of thermal spraying equipment and a large number of industrial comparative tests and parameter measurement. In this process, the fund budget should be carried out scientifically to ensure the solution of the overall fund problem.

How are pneumatic butterfly valves classified?
The important connection components in engineering technology are separated from corrugated flexible pipes, mesh sleeves and joints. It is used in various gas transmission and infusion pipeline systems, as well as length, temperature, position and angle compensation systems. It is used as compensation elements, sealing elements, connecting elements and shock absorption elements, and is applied in aerospace, petrochemical, mining electronics, machinery and shipbuilding, medical and health, textile electronics, energy architecture, metallurgy and other fields.
The material is austenitic stainless steel, mainly 304L and 316L. It can also be manufactured according to the data requested by the user. There are pump connections, air conditioners and insulation bellows.
It uses two kinds of metal bellows, one is spiral corrugated, the other is annular corrugated. The specifications, sizes and models are classified as DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400. The hose pressure can be divided into 2.5KG pressure, 6KG pressure, 10KG pressure, 16KG pressure, 25KG pressure, etc.