【正文】
供氣體制采用中壓一級管網(wǎng)系統(tǒng),規(guī)劃采用箱式區(qū)域調(diào)壓或樓棟調(diào)壓供居民及公建用氣。 用地布局規(guī)劃表 表 1 概述 3 燃氣工程規(guī)劃 ( 1)規(guī)劃原則 堅持科學的發(fā)展觀,積極采用新工藝、新設備、新技術、新材料,做到技術先進、經(jīng)濟合理、安全可靠。 用地布局 ( 1)醫(yī)療衛(wèi)生用地 規(guī)劃縣級綜合醫(yī)院和社區(qū)醫(yī)療、保健、服務中心二級醫(yī)療系統(tǒng),滿足不同功能要求。 居民點及工礦用地 所占比例為 3%,水域所占比例為%, 未利用土地 所占比例最小, 為 %, 包括 裸巖石礫地 和裸土地。地理坐標為北緯 40176。 燃氣管道壓力降的 確定 ........................................................... 錯誤 !未定義書簽。 總平面布置 .............................................................................. 錯誤 !未定義書簽。 氣化站設計標準 ....................................................................... 錯誤 !未定義書簽。 管道敷設方式 ...........................................................................................................34 管材選擇 ....................................................................................... 錯誤 !未定義書簽。 CNG汽車用戶年用氣量 ...................................................................................... 19 采暖用氣量 .............................................................................. 錯誤 !未定義書簽。 重慶大學本科學生畢業(yè)設計(論文) II ABSTRACT Being a widelyuse source of modern city living and production, city gas is playing a more and more important role in the source structure of our country. And the main purpose of city gas planning is to design the form and the trend of the pipe of city gas, the process and the general layout of the gas stations and so on, based on the national urban development and construction guidelines, economy and technical policies, the longterm plans of national economy and social development, as well as the the of natural and historical conditions, present characteristics and building conditions of the city, which can build a better conditon for urban development and construction. Following the national policies of energetically spread to use natural gas, this design confirms natural gas to be the source gas of the city. Natural gas is a kind of clean energy, use natural gas to be the source gas of a city has significant positive effects for improving the problems of urban pollution and promoting sustainable urban development. The main task of this design is to plan for the city gas of Lijiang City, Yunnan Province. The city39。 作為現(xiàn)代城市生活和生產(chǎn)中一種廣泛應用的能源,城市燃氣在我國的能源結構中占有越來越重要的作用,而城市燃氣規(guī)劃的主要目的是根據(jù)國家城市發(fā)展和建設方針、經(jīng)濟和技術政策、國民經(jīng)濟和社會發(fā)展的長遠計劃,以及城市所在地區(qū)的自然條件、歷史情況、現(xiàn)狀特點和建設條件,設計城市燃氣管網(wǎng)的形式、走向以及壓力機制,設計燃氣場站的工藝流程、平面布置等,為城市的發(fā)展建設創(chuàng)造更好的條件。本次設計得主要內(nèi)容包括對該城市燃氣近、遠期氣源論證,各類用戶的比例及用氣定額的論證計算,城市燃氣輸配系統(tǒng)的選擇論證及設計計算, LNG 氣化站的工藝流程及其平面布置的設計,儲配站的工藝流程及其平面布置的設計,區(qū)域調(diào)壓站的布置,某 住宅樓的室內(nèi)燃氣管道設計等。 3 氣源、供氣規(guī)模及氣 化范圍 ............................................................................ 9 基礎設計參數(shù) ............................................................................................................ 5 氣象參數(shù) ............................................................................................................. 5 抗震防災要求 ...................................................................................................... 5 環(huán)境保護要求 ...................................................................................................... 6 天然氣氣源 ............................................................................................................... 9 重慶大學本科學生畢業(yè)設計(論文) IV 近、 遠期氣源選擇及論證 ..................................................................................... 9 氣源設計參數(shù) ...................................................................................................... 9 氣化原則 ......................................................................................... 錯誤 !未定義書簽。 儲氣方式對比論證 ..............................................................................................27 6 輸配管網(wǎng)系統(tǒng)及水力計算 ...............................................................................31 燃氣管網(wǎng)系統(tǒng)選擇和管網(wǎng)布線原則 ...........................................................................31 燃氣管網(wǎng)壓力級制 ..............................................................................................31 采用不同壓力級制的原因 ...................................................................................31 燃氣管網(wǎng)系統(tǒng)的選擇 ..........................................................................................32 管網(wǎng)布線依據(jù)及原則 ..........................................................................................32 輸配管網(wǎng)系統(tǒng)方案比選 .................................................................. 錯誤 !未定義書簽。 區(qū)域調(diào)壓站工藝設計 ................................................................................................ 38 區(qū)域調(diào)壓站的組成及其設備 ............................................................................... 38 調(diào)壓站的分類及選址 .......................................................................................... 38 調(diào)壓站的布置 .................................................................................................... 39 調(diào)壓站的最佳作用半徑的確定 .................................................................................. 39 調(diào)壓器的選型 .......................................................................................................... 40 近、遠期壓力和用氣負荷的影響 ........................................................................ 41 調(diào)壓流程方案的影響 .......................................................................................... 41 降低噪聲的影響 ................................................................................................. 41 8 LNG 氣化站設計 ...................................................................... 錯誤 !未定義書簽。 氣化器、加熱器選型設 計 ................................................................................... 47 閥門與管材、管件選型 ...................................................................................... 49 工藝控制點的設置 ............................................................................................. 50 消防設計 .........................................................