【正文】 1 摘 要 城鎮(zhèn)燃氣化是城市現(xiàn)代化的重要標志之一。城鎮(zhèn)燃氣在發(fā)展生產(chǎn)、 提高人民生活水平、節(jié)約能源、減輕污染、改善環(huán)境等方面起著重要作用。 本設計主要是針對開發(fā)區(qū)進行燃氣管網(wǎng)的規(guī)劃，該設計采用天然氣為氣源，燃氣管道主要采用鋼管。首先根據(jù)城市的面積及人口情況對開發(fā)區(qū)的燃氣需用量進行確定，然后根據(jù)用氣量及規(guī)劃要求 進行管網(wǎng)設計。在設計燃氣管網(wǎng)時，應全面考慮經(jīng)濟、技術等方面因素，選擇經(jīng)濟合理的最佳方案。 因此本設計選用了中壓一級管網(wǎng)系統(tǒng)。 根據(jù)管網(wǎng)的布置和流量，經(jīng)過水力計算的一系列步驟確定管徑；再將管徑作為已知條 件，再選取調(diào)壓設施以及用戶燃具后滿足供應的壓力要求，設計具有一定的技術性和經(jīng)濟性。 關鍵詞： 天然氣 管網(wǎng) 用氣量 管徑 2 Abstract Universality of Gas in city is an important sign of the modernization of city. In the development and production of city, improving living standards, energy conservation, reducing pollution and improving the environment, gas plays as an important role. The theme of this paper is to design the gas work in the development zone, taking the natural gas as the gas source, the steel pipe as the main gas pipeline. Firstly, according to the city area and the demographic situation of the development zone to determine the amount of gas needed。 and secondly to design the work according to the gas consumption and the requirements of the plan. In the design of gas pipeline work, the economic, technological and other factors should be considered Comprehensively。 finally, choose the best economical solution. therefore this design has selected center presses level of pipe works systems. In the above pipe work system, used the region to adjust the pressure to stand to the region air feed way. According to pipe work arrangement and current capacity, process water power putation a series of steps definite caliber。 Again the caliber took the datum, after selects the accent to press the facility as well as the user again burns has satisfies the supply the pressure request. The design has the very good technical nature and the efficiency. Keywords: The Natural gas The pipe work Gas consumption Diameter 3 目 錄 第一章 緒 論 .................................................................................. 1 概述 ......................................................................................................... 1 自然地理環(huán)境概況 ................................................................................. 1 地理位置 ...................................................................................... 1 氣候條件 ...................................................................................... 2 設計原始資料 ......................................................................................... 2 城市面積 ...................................................................................... 2 燃氣用戶 ...................................................................................... 2 設計范圍 ................................................................................................. 2 第二章 燃氣的性質(zhì)計算 ................................................................ 3 氣源 ......................................................................................................... 3 氣體性質(zhì) ................................................................................................. 3 平均分子量 .................................................................................. 3 平均密度和相對密度 .................................................................. 4 粘度 .............................................................................................. 4 爆炸極限 ...................................................................................... 5 混合物的熱值 .............................................................................. 6 華白數(shù) .......................................................................................... 7 燃氣質(zhì)量要求及燃氣的加臭 ................................................................. 7 城鎮(zhèn)燃氣質(zhì)量要求 ...................................................................... 7 城鎮(zhèn)燃氣的加臭 .......................................................................... 8 第三章 燃氣需用量及供需平衡 .................................................... 9 用戶類型及供氣原則 ............................................................................. 9 城市用氣量 ........................................................................................... 10 居民生活用戶用氣量 ................................................................ 10 商業(yè)用戶用氣量 ........................................................................ 11 工業(yè)企業(yè)用戶用氣 .................................................................... 12 其他用氣量 ................................................................................ 13 各類用戶用氣量計算匯總 ................................................................... 13 計算流量 ............................................................................................... 13 燃氣輸配系統(tǒng)的供需平衡 ................................................................... 14 4 儲氣罐 ................................................................................................... 15 所需儲氣量 ................................................................................ 15 高壓球型儲氣罐容積的確定 .................................................... 17 第四章 輸配系統(tǒng)方案的選擇 ...................................................... 18 城鎮(zhèn)燃氣輸配系統(tǒng)的組成 ................................................................... 18 燃氣管網(wǎng)系統(tǒng)的選擇 ........................................................................... 18 第五章 輸配管網(wǎng)的布置 .............................................................. 20 城鎮(zhèn)燃氣管道的布線原則 ................................................................... 20 管線布置依據(jù) ............................................................................ 20 高、中壓管網(wǎng)的平面布置 ........................................................ 20 低壓管網(wǎng)的平面布置 ................................................................ 21 管道的縱斷面布置 .................................................................... 22 燃氣管道穿越障礙物的設計 ..............................