我國(guó)鋼鐵企業(yè)的電力消耗約占全社會(huì)總能耗的15%左右，鋼鐵企業(yè)的各類(lèi)自備電力裝置發(fā)電量約占總體耗電量的50%，部分鋼鐵企業(yè)可達(dá)90%以上。鋼鐵企業(yè)在生產(chǎn)的過(guò)程中，會(huì)伴生大量的高爐煤氣、焦?fàn)t煤氣和轉(zhuǎn)爐煤氣，扣除鋼鐵生產(chǎn)過(guò)程中自用的部分，仍然剩有大量的煤氣。利用剩余的煤氣發(fā)電，是各鋼鐵企業(yè)的共識(shí)。如何高效利用這部分煤氣資源，降低企業(yè)綜合能耗成本，增加企業(yè)效益和市場(chǎng)競(jìng)爭(zhēng)力，值得我們認(rèn)真研究。目前國(guó)內(nèi)大型鋼鐵企業(yè)用煤氣來(lái)發(fā)電的機(jī)組，一般是常規(guī)BTG發(fā)電機(jī)組和低熱值CCPP（燃?xì)庹羝?lián)合循環(huán)）發(fā)電機(jī)組，常規(guī)發(fā)電機(jī)組目前使用比較多的是高壓、超高壓機(jī)組、亞臨界、超臨界機(jī)組，而中溫中壓的機(jī)組逐漸淘汰。低熱值CCPP機(jī)組使用比較多的是 公司產(chǎn)品，其中主要的機(jī)型為M701S(DA）、M701S(DA)X，M251S型等，少量使用其他燃?xì)廨啓C(jī)公司的產(chǎn)品。

　　The electricity consumption of China's steel enterprises accounts for about 15% of the total energy consumption of the whole society. The power generation of various self owned power devices of steel enterprises accounts for about 50% of the total electricity consumption, and some steel enterprises can reach more than 90%. During the production process of steel enterprises, a large amount of blast furnace gas, coke oven gas, and converter gas are generated. After deducting the self use part in the steel production process, there is still a large amount of gas left. It is the consensus of various steel enterprises to use surplus gas for power generation. How to efficiently utilize this part of gas resources, reduce the comprehensive energy consumption cost of enterprises, increase enterprise efficiency and market competitiveness is worthy of our serious research. At present, large domestic steel enterprises use coal gas to generate electricity, generally including conventional BTG generator sets and low calorific value CCPP (gas steam combined cycle) generator sets. Conventional generator sets are more commonly used in high-pressure, ultra-high pressure, subcritical, and supercritical units, while medium temperature and medium pressure units are gradually being phased out. The most commonly used low calorific value CCPP units are products from Mitsubishi Corporation in Japan, with the main models being M701S (DA), M701S (DA) X, M251S, etc., and a small amount using products from other gas turbine companies.

　　1 各種煤氣發(fā)電機(jī)組的介紹1.1 常規(guī)BTG發(fā)電機(jī)組常規(guī)BTG煤氣發(fā)電機(jī)組，經(jīng)過(guò)了多年的發(fā)展，特別是鍋爐、汽輪機(jī)高參數(shù)小型化技術(shù)的不斷延伸，低熱值常規(guī)煤氣發(fā)電經(jīng)歷了五代技術(shù)，主要經(jīng)濟(jì)指標(biāo)如下表1：表1 常規(guī)BTG煤氣發(fā)電機(jī)組序號(hào)項(xiàng)目第一代技術(shù)第二代技術(shù)第三代技術(shù)第四代技術(shù)第五代技術(shù)1主機(jī)參數(shù)中溫中壓或次高溫次高壓高溫高壓高溫超高壓（帶中間再熱）超高溫亞臨界超臨界2典型機(jī)組規(guī)模（MW）255035～13580～135135～1503鍋爐容量 （t/h）130220130～440260～440420～4804全廠熱效率（%）25～2830～32?36～38?40～4143.5～44.55煤氣單耗 m?/kWh（760kcal/m?）4.53～4.043.77～3.54?3.14～2.98?2.83～2.762.63～2.54技術(shù)的進(jìn)步推動(dòng)了煤氣發(fā)電利用效率的不斷提高，亦為鋼鐵企業(yè)煤氣發(fā)電項(xiàng)目提供了新的技術(shù)路線選擇。高溫超高壓中間一次再熱發(fā)電機(jī)組，根據(jù)燃煤電廠傳統(tǒng)容量參數(shù)匹配原則，其主要應(yīng)用于135MW及以上大型機(jī)組。2013年以來(lái)，由于節(jié)能減排以及裝備升級(jí)改造任務(wù)日益緊迫，以往應(yīng)用于大型燃煤機(jī)組的超高壓中間再熱技術(shù)逐漸向小型化發(fā)展，目前國(guó)內(nèi)有40MW、50MW、65MW、80MW、100MW、135MW等級(jí)超高壓中間再熱煤氣發(fā)電機(jī)組。2017年行業(yè)內(nèi)又推出了小型亞臨界煤氣發(fā)電技術(shù)，目前國(guó)內(nèi)有80MW、100MW、120MW、135MW等級(jí)亞臨界煤氣發(fā)電機(jī)組。隨著技術(shù)的進(jìn)步，2020年來(lái)，行業(yè)內(nèi)開(kāi)始推出高效超臨界煤氣發(fā)電技術(shù)（135MW～150MW），目前145MW級(jí)別高效超臨界機(jī)組已有多臺(tái)投產(chǎn)或正在建設(shè)中。

　　1 Introduction to Various Gas Generator Sets 1.1 Conventional BTG Generator Sets Conventional BTG gas generator sets, after years of development, especially the continuous extension of high parameter miniaturization technology for boilers and steam turbines, low calorific value conventional gas power generation has gone through five generations of technology. The main economic indicators are as follows: Table 1: Number of Conventional BTG Gas Generator Sets Project: First Generation Technology, Second Generation Technology, Third Generation Technology, Fourth Generation Technology, Fifth Generation Technology 1 Main Machine Parameters: Medium Temperature, Medium Pressure or Sub high Temperature, Sub high Pressure, High Temperature, Ultra High Pressure (with intermediate reheating), Ultra High Temperature Subcritical Supercritical 2 Typical Unit Scale (MW) 255035-13580-135135-1503 Boiler Capacity (t/h) 130220130-440260-440420-4804 Whole Plant Thermal efficiency (%) 25~2830~32? 36～38? 40-4143.5-44.55 coal gas unit consumption m?/kWh (760kcal/m?) 4.53-4.043.77-3.54? 3.14～2.98? The progress of technology from 2.83 to 2.762.63 to 2.54 has promoted the continuous improvement of the utilization efficiency of gas power generation, and also provided new technological route choices for gas power generation projects in steel enterprises. High temperature and ultra-high pressure intermediate reheating power generation units, according to the traditional capacity parameter matching principle of coal-fired power plants, are mainly used for large units of 135MW and above. Since 2013, due to the increasingly urgent tasks of energy conservation, emission reduction, and equipment upgrading, the ultra-high pressure intermediate reheating technology previously applied to large coal-fired units has gradually developed towards miniaturization. Currently, there are 40MW, 50MW, 65MW, 80MW, 100MW, and 135MW levels of ultra-high pressure intermediate reheating coal-fired power generation units in China. In 2017, small-scale subcritical gas power generation technology was introduced in the industry. Currently, there are 80MW, 100MW, 120MW, and 135MW levels of subcritical gas power generation units in China. With the advancement of technology, high-efficiency supercritical gas power generation technology (135MW~150MW) has been introduced in the industry since 2020. Currently, multiple 145MW level high-efficiency supercritical units have been put into operation or are under construction.

　　1.2 CCPP發(fā)電機(jī)組對(duì)于燃?xì)庹羝?lián)合循環(huán)發(fā)電技術(shù)（CCPP），國(guó)內(nèi)外燃?xì)廨啓C(jī)廠家針對(duì)鋼鐵企業(yè)低熱值煤氣特點(diǎn)陸續(xù)推出其主流機(jī)型，單機(jī)聯(lián)合循環(huán)出力在300MW級(jí)以下的主要有：三菱公司M701S系列，目前主推的是M701S(DA)、M701S(DA)X兩種機(jī)型；還有M251S系列（聯(lián)合循環(huán)總功率50MW，效率38%）。安薩爾多公司的AE系列，目前主推的是AE94.2KS機(jī)型；GE公司主推的9E系列等。下表2列出了部分CCPP機(jī)型的主要技術(shù)參數(shù)。表2 CCPP機(jī)組主要性能參數(shù)表序號(hào)名稱(chēng)單位三菱安薩爾多GE1燃機(jī)型號(hào)/M701S(DA)M701S(DA)XAE94.2KS9E系列2CCPP總輸出功率MW1501862191703發(fā)電效率%4547.346.3444設(shè)計(jì)燃料熱值kJ/m?439643963640～45504396目前國(guó)內(nèi)高爐煤氣燃機(jī)發(fā)電技術(shù)以三菱公司市場(chǎng)占有率最高，技術(shù)相對(duì)成熟，售后維護(hù)體系較完善。

　　1.2 CCPP Generator Set For gas steam combined cycle power generation technology (CCPP), domestic and foreign gas turbine manufacturers have successively launched their mainstream models based on the characteristics of low calorific value gas in steel enterprises. The main models with single unit combined cycle output below 300MW are Mitsubishi M701S series, currently mainly promoting M701S (DA) and M701S (DA) X models; There is also the M251S series (combined cycle total power of 50MW, efficiency of 38%). Ansaldo's AE series currently mainly promotes the AE94.2KS model; GE's main products include the 9E series. Table 2 lists the main technical parameters of some CCPP models. Table 2 CCPP Unit Main Performance Parameters Table Number Name Unit Mitsubishi Ansaldo GE1 Gas Turbine Model/M701S (DA) M701S (DA) XAE94.2KS9E Series 2CCPP Total Output Power MW1501862191703 Power Generation Efficiency% 4547.346-3444 Design Fuel Heat Value kJ/m? At present, Mitsubishi Corporation has the highest market share in domestic blast furnace gas turbine power generation technology, with relatively mature technology and a relatively complete after-sales maintenance system.

　　2?發(fā)電機(jī)組特性比較

　　2. Comparison of generator set characteristics

　　2.1 發(fā)電效率CCPP機(jī)組效率高，以三菱公司的M701S(DA)X為例，滿(mǎn)負(fù)荷效率可以達(dá)到47.3%，高于常規(guī)BTG亞臨界機(jī)組的40～41%、超臨界機(jī)組的43.5～44.5%。但是CCPP機(jī)組隨著負(fù)荷率的下降，熱效率下降很快，該機(jī)型在50%負(fù)荷時(shí)，熱效率相當(dāng)于常規(guī)超高壓煤氣發(fā)電機(jī)組，最低負(fù)荷40MW時(shí)，熱效率不如常規(guī)高壓煤氣發(fā)電機(jī)組。而常規(guī)BTG發(fā)電機(jī)組的熱效率，隨著負(fù)荷率的波動(dòng)，變化相對(duì)較小。所以CCPP機(jī)組需要運(yùn)行在高負(fù)荷，煤氣保障是剛性的，適合作為穩(wěn)定的基礎(chǔ)煤氣資源發(fā)電機(jī)組，不適合作為煤氣調(diào)節(jié)發(fā)電機(jī)組。常規(guī)BTG機(jī)組對(duì)于環(huán)境溫度變化不敏感，但是CCPP機(jī)組在夏季高溫環(huán)境下，因?yàn)檫M(jìn)入壓氣機(jī)的空氣密度變稀薄，壓縮機(jī)的功耗增加，燃機(jī)出力會(huì)有一定程度的下降，發(fā)電效率也會(huì)受到影響。CCPP機(jī)組廠用電率在2～4%，而常規(guī)BTG煤氣機(jī)組的廠用電率一般在8%左右。

　　2.1 Power generation efficiency CCPP units have high efficiency. Taking Mitsubishi's M701S (DA) X as an example, the full load efficiency can reach 47.3%, which is higher than the 40-41% of conventional BTG subcritical units and the 43.5-44.5% of supercritical units. However, as the load rate decreases, the thermal efficiency of CCPP units decreases rapidly. At 50% load, the thermal efficiency of this model is equivalent to that of a conventional ultra-high pressure gas generator unit. At a minimum load of 40MW, the thermal efficiency is not as good as that of a conventional high-pressure gas generator unit. The thermal efficiency of conventional BTG generator sets varies relatively little with the fluctuation of load rate. So CCPP units need to operate at high loads, and gas guarantee is rigid, suitable as a stable basic gas resource generator unit, not suitable as a gas regulated generator unit. Conventional BTG units are not sensitive to changes in ambient temperature, but CCPP units experience a certain degree of decrease in gas turbine output and power generation efficiency due to the thinning of air density entering the compressor during high temperatures in summer. The power consumption rate of CCPP units is 2-4%, while the power consumption rate of conventional BTG gas units is generally around 8%.

　　2.2 燃料的適應(yīng)性及負(fù)荷調(diào)節(jié)CCPP機(jī)組運(yùn)行中，對(duì)燃料品質(zhì)要求高，CCPP機(jī)組其輸入燃料熱值需要保證在800～1200kcal/m?范圍，全部使用高爐煤氣燃燒一般很難實(shí)現(xiàn)滿(mǎn)負(fù)荷。以三菱公司的M701S(DA)X為例，當(dāng)燃料熱值處于設(shè)計(jì)點(diǎn)工況（4396kJ/m?）時(shí)，效率最高，熱值偏離設(shè)計(jì)熱值時(shí)，燃機(jī)出力會(huì)有一定的下降，嚴(yán)重時(shí)還會(huì)導(dǎo)致機(jī)組跳機(jī)。而常規(guī)的BTG煤氣發(fā)電機(jī)組，對(duì)于煤氣的適應(yīng)性較好，可以在高爐煤氣、焦?fàn)t煤氣和轉(zhuǎn)爐煤氣之間進(jìn)行比較有效的切換調(diào)節(jié)，能適應(yīng)煤氣熱值波動(dòng)帶來(lái)的影響，煤氣品種及流量配比性較CCPP機(jī)組好。CCPP機(jī)組負(fù)荷調(diào)節(jié)速率相對(duì)較低，而常規(guī)煤氣發(fā)電機(jī)組負(fù)荷調(diào)節(jié)范圍大，變化率快，這方面常規(guī)煤氣發(fā)電機(jī)組具有優(yōu)勢(shì)，是最佳煤氣緩沖用戶(hù)和保證手段。

　　2.2 Fuel adaptability and load regulation. In the operation of CCPP units, high fuel quality is required, and the input fuel calorific value of CCPP units needs to be ensured to be between 800 and 1200 kcal/m? It is generally difficult to achieve full load using blast furnace gas combustion for the entire range. Taking Mitsubishi's M701S (DA) X as an example, when the fuel calorific value is at the design point operating condition (4396kJ/m?), the efficiency is highest. When the calorific value deviates from the design calorific value, the output of the gas turbine will decrease to a certain extent, and in severe cases, it may even cause the unit to trip. Conventional BTG gas generator sets have good adaptability to gas and can effectively switch and adjust between blast furnace gas, coke oven gas, and converter gas. They can adapt to the impact of gas calorific value fluctuations and have better gas variety and flow ratio than CCPP units. The load adjustment rate of CCPP units is relatively low, while the load adjustment range of conventional gas generator units is large and the change rate is fast. In this regard, conventional gas generator units have advantages and are the best gas buffering users and guarantee means.

　　2.3 對(duì)外供熱對(duì)外供熱方面，常規(guī)BTG機(jī)組可以容易實(shí)現(xiàn)汽輪機(jī)抽汽供熱，具有優(yōu)勢(shì)，而CCPP機(jī)組相對(duì)劣勢(shì)。常規(guī)BTG機(jī)組發(fā)電加上供熱，按照國(guó)家目前的好處歸電計(jì)算模式，發(fā)電熱效率會(huì)上升，供熱量越大，發(fā)電熱效率越高，可能超過(guò)CCPP機(jī)組熱效率。

　　2.3 External Heating In terms of external heating, conventional BTG units can easily achieve steam turbine extraction heating, which has advantages, while CCPP units are relatively disadvantaged. Conventional BTG units generate electricity and provide heating. According to the current national benefit based calculation model, the thermal efficiency of electricity generation will increase. The larger the heating capacity, the higher the thermal efficiency of electricity generation, which may exceed that of CCPP units.

　　2.4 運(yùn)行自動(dòng)化水平從運(yùn)行便利及自動(dòng)化程度來(lái)看，CCPP機(jī)組自動(dòng)化程度高，運(yùn)行更輕松，可以實(shí)現(xiàn)一鍵啟動(dòng)，運(yùn)行人員少。相對(duì)常規(guī)BTG煤氣機(jī)組還不能做到一鍵啟動(dòng)，近期國(guó)內(nèi)常規(guī)BTG機(jī)組自啟停APS技術(shù)取得了一定的進(jìn)展。

　　From the perspective of operational convenience and automation level, CCPP units have a high degree of automation, making operation easier and enabling one click start with fewer operators. Compared to conventional BTG gas units, one key start cannot be achieved yet. Recently, there has been some progress in the self start stop APS technology for conventional BTG units in China.

　　2.5 檢修周期及費(fèi)用CCPP機(jī)組的檢修周期一般大修間隔時(shí)間在2年左右，檢修時(shí)間約1個(gè)月，以三菱公司的M701S(DA)X為例，一次大修費(fèi)用3500～4000萬(wàn)元。而常規(guī)的煤氣發(fā)電機(jī)組，以135MW亞臨界機(jī)組為例，可以做到大修周期5年，每次大修時(shí)間25天，大修費(fèi)用500～1500萬(wàn)元。檢修費(fèi)用、總發(fā)電時(shí)間常規(guī)機(jī)組占有優(yōu)勢(shì)。

　　2.5 Maintenance cycle and cost: The maintenance cycle of CCPP units generally has a major overhaul interval of about 2 years and a maintenance time of about 1 month. Taking Mitsubishi's M701S (DA) X as an example, the cost of one major overhaul is 35-40 million yuan. Conventional gas-fired power generation units, such as 135MW subcritical units, can achieve a maintenance cycle of 5 years, with each maintenance lasting 25 days and a maintenance cost of 5 to 15 million yuan. Conventional units have advantages in maintenance costs and total power generation time.

　　2.6 環(huán)保方面 CCPP機(jī)組煙氣環(huán)保指標(biāo)更容易實(shí)現(xiàn)，煙氣中粉塵、SO2、NOX指標(biāo)都是按煙氣含氧量15%的標(biāo)準(zhǔn)計(jì)算的。而常規(guī)的煤氣發(fā)電機(jī)組這些環(huán)保指標(biāo)都是按煙氣含氧量3%的標(biāo)準(zhǔn)計(jì)算，一般需要上脫硫脫硝裝置，煙氣才能達(dá)標(biāo)排放。由于煤氣比較臟，CCPP機(jī)組在煤氣進(jìn)燃機(jī)之前需要經(jīng)過(guò)濕式電除塵器的處理，不僅可以降低煤氣中粉塵的含量，同時(shí)也能減少煤氣中的無(wú)機(jī)硫成份。CCPP機(jī)組耗水量1.2t/MW左右，與常規(guī)發(fā)電機(jī)組比較低一半。

　　2.6 In terms of environmental protection, CCPP unit flue gas environmental indicators are easier to achieve, and the dust, SO2, and NOX indicators in the flue gas are calculated based on the standard of 15% oxygen content in the flue gas. And the environmental indicators of conventional gas power generation units are calculated based on the standard of 3% oxygen content in flue gas. Generally, desulfurization and denitrification devices are required for the flue gas to meet the emission standards. Due to the relatively dirty nature of the gas, CCPP units require wet electrostatic precipitators to treat the gas before it enters the combustion engine. This not only reduces the dust content in the gas, but also reduces the inorganic sulfur content in the gas. The water consumption of CCPP units is about 1.2t/MW, which is half lower than that of conventional power generation units.

　　2.7 基建方面CCPP機(jī)組基建費(fèi)用較高，以M701S(DA)X機(jī)型為例，單位裝機(jī)投資約5500元/kWh，常規(guī)亞臨界135MW機(jī)組單位裝機(jī)投資約3000～3500元/kWh。土地占用方面，CCPP機(jī)組占地少，常規(guī)機(jī)組占地多。CCPP機(jī)組的核心部件，例如燃燃機(jī)高溫?zé)岵考懊簤簷C(jī)等設(shè)備供貨嚴(yán)重依賴(lài)于進(jìn)口，并且設(shè)備供貨期較長(zhǎng)，面臨著“卡脖子”及進(jìn)口替代難題。而常規(guī)BTG煤氣機(jī)組技術(shù)國(guó)內(nèi)全部掌握，不會(huì)受制于人。

　　2.7 In terms of infrastructure, CCPP units have relatively high construction costs. Taking the M701S (DA) X model as an example, the unit installed investment is about 5500 yuan/kWh, while the unit installed investment for conventional subcritical 135MW units is about 3000-3500 yuan/kWh. In terms of land occupation, CCPP units occupy less land, while conventional units occupy more land. The core components of CCPP units, such as high-temperature thermal components of gas turbines and coal compressors, heavily rely on imports for supply, and the equipment supply period is long, facing bottlenecks and import substitution problems. And the conventional BTG gas turbine technology is fully mastered domestically and will not be controlled by others.

　　3?新建發(fā)電機(jī)組布局原則

　　3. Layout principles for new generator sets

　　3.1 企業(yè)有穩(wěn)定的煤氣回收量或有相應(yīng)的儲(chǔ)氣柜，在發(fā)電機(jī)組布局時(shí)，根據(jù)煤氣的總量及變化趨勢(shì)，CCPP機(jī)組裝機(jī)容量應(yīng)能夠承擔(dān)消耗大約60～70%的總煤氣量，作為煤氣剛性用戶(hù)，高負(fù)荷運(yùn)行，充分發(fā)揮CCPP機(jī)組熱效率高的特點(diǎn)。剩余的煤氣根據(jù)需要配置亞臨界或者超臨界常規(guī)發(fā)電機(jī)組，常規(guī)機(jī)組裝機(jī)容量應(yīng)能夠消耗總煤氣量50%以上，作為煤氣調(diào)節(jié)用戶(hù)。煤氣發(fā)電機(jī)組總裝機(jī)容量要有一定的裕量，才能保證在煤氣波動(dòng)，機(jī)組檢修、故障等狀態(tài)下，煤氣資源不大量放散。可以最大效率地利用煤氣發(fā)電。

　　3.1 Enterprises have stable gas recovery capacity or corresponding gas storage tanks. When laying out power generation units, the installed capacity of CCPP units should be able to bear approximately 60-70% of the total gas consumption based on the total amount and trend of gas. As a rigid gas user, CCPP units operate at high loads and fully utilize their high thermal efficiency. The remaining gas should be configured with subcritical or supercritical conventional power generation units as needed, and the installed capacity of conventional units should be able to consume more than 50% of the total gas volume as gas regulation users. The total installed capacity of a gas generator set must have a certain margin to ensure that gas resources are not released in large quantities during gas fluctuations, unit maintenance, malfunctions, and other conditions. Gas can be used to generate electricity with maximum efficiency.

　　3.2 如企業(yè)有供熱需求，應(yīng)選擇可抽汽供熱的亞臨界或超臨界（中間再熱）常規(guī)煤氣機(jī)組，這樣有利于提高整個(gè)機(jī)組的綜合熱效率。

　　3.2 If the enterprise has a heating demand, it should choose subcritical or supercritical (intermediate reheating) conventional gas units that can extract steam for heating, which is conducive to improving the comprehensive thermal efficiency of the entire unit.

　　3.3 煤粉摻燒煤氣發(fā)電機(jī)組，從靈活性消耗煤氣資源角度，是比較理想的適應(yīng)煤氣變化機(jī)組，如果企業(yè)已經(jīng)有這樣的機(jī)組，可以通過(guò)技術(shù)改造，增加煤氣摻燒比例，提升煤氣調(diào)節(jié)效果。

　　3.3 Coal powder co fired gas power generation units are ideal for adapting to gas changes from the perspective of flexible consumption of gas resources. If the enterprise already has such units, it can increase the proportion of gas co fired through technological transformation to improve the gas regulation effect.

　　3.4 在新增煤氣發(fā)電機(jī)組的時(shí)候，必須進(jìn)行經(jīng)濟(jì)效益的測(cè)算，可以根據(jù)煤氣供應(yīng)的變化趨勢(shì)，綜合考慮基建費(fèi)用，發(fā)電機(jī)組檢修時(shí)間、費(fèi)用，煤氣柜的布置情況等因素，以數(shù)個(gè)機(jī)組大修周期為計(jì)算時(shí)間，全面進(jìn)行綜合比較，定量化分析后，才能達(dá)到最好的經(jīng)濟(jì)性，布局出最佳的煤氣發(fā)電機(jī)組組合。

　　3.4 When adding a new gas generator unit, economic benefits must be calculated. Based on the trend of gas supply changes, factors such as infrastructure costs, generator unit maintenance time and costs, and gas cabinet layout can be comprehensively considered. Multiple unit overhaul cycles should be taken as the calculation time, and comprehensive comparisons and quantitative analysis should be conducted to achieve the best economy and layout of the best gas generator unit combination.

　　綜上，鋼鐵企業(yè)煤氣利用發(fā)電原則就是追求最優(yōu)的經(jīng)濟(jì)效益，在全面分析的基礎(chǔ)上做出適合企業(yè)自身?xiàng)l件的選擇策略。

　　In summary, the principle of utilizing gas for power generation in steel enterprises is to pursue optimal economic benefits and make selection strategies that are suitable for the enterprise's own conditions based on comprehensive analysis.

　　本文由  煤氣發(fā)電機(jī)組  友情奉獻(xiàn).更多有關(guān)的知識(shí)請(qǐng)點(diǎn)擊  http://www.scmetafusion.com/   真誠(chéng)的態(tài)度.為您提供為全面的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待.

　　This article is a friendly contribution from a gas generator set For more related knowledge, please click http://www.scmetafusion.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.