Evaluating the Effect of Economizer on Efficiency of the Fire Tube Steam Boiler

Pada umumnya petani jamur dalam melakukan proses sterilisasi masih menggunakan alat sederhana berupa bejana dari drum bekas yang dipanaskan dengan tungku/gas elpiji, sehingga suhu tidak tercapai (< 100 oC), waktu pemanasan terlalu lama (6-8 jam) dan lebih 30% terkontaminasi oleh jamur liar. Tujuan dari modifikasi alat ini adalah mengetahui suhu dan tekanan yang optimal pada proses sterilisasi media tumbuh jamur (Baglog), sehingga kontaminasi jamur liar dapat berkurang, kapasitas produksi dapat ditingkatkan dan waktu sterilisasi baglog dapat dipersingkat. Metode yang digunakan adalah pertama melakukan desain gambar alat, kemudian pembuatan alat, uji coba dan unjuk kerja alat. Modifikasi Alat, terdiri dari 2 (dua) Unit yaitu Boiler dan Sterilisator. Boiler adalah bejana tertutup dimana panas pembakaran dialirkan ke air sampai terbentuk air panas atau steam, kemudian digunakan untuk mengalirkan panas ke suatu proses. Unit boiler yang digunakan tipe Water Tube Boiler, tipe ini air umpan boiler mengalir melalui pipa–pipa masuk ke dalam bejana. Air yang tersikulasi dipanaskan oleh gas pembakar membentuk steam pada daerah uap dalam bejana. Unit boiler terbuat dari plat baja tebal 3,5 mm, tinggi 125 cm dan diameter 57 cm, dilengkapi dengantermometer,presure gauge,savety valve,kran pengalir uap panas. Bagian dalam bawah terdapat pipa pemanas air dari pipa schedule 1 inch, yang dipasang horizontal 20 buah. Di bagian samping dipasang pipa kaca tebal 5 mm untuk memantau level air. Kaki dari besi baja Kanal U/ UNP tinggi 30 cm. Sterilisator atau autoklaf ; alat pemanas tertutup untuk mensterilisasi suatu benda menggunakan uap bersuhu dan bertekanan tinggi (1210C, 15 lbf/in2) selama kurang lebih 15 menit. Suhu yang tinggi inilah yang akan membunuh microorganisme. Unit sterilisator dari plat stainless steel tebal 2 mm, tinggi 150 cm dan diameter 120 cm. Bagian dalam diberi plat stainless steel vorporasi tebal 1,3 mm dan rak dorong dari kawat stainless steel setinggi 27 cm. Bagian atas dipasang termometer. Kaki dari baja siku setinggi 50 cm. Hasil uji coba unjuk kerja alat diperoleh kapasitas stelisator 350-500 baglog, suhu berkisar 100-120 0C tekanan 1,5-1,9 bar, waktu tercapainya suhu pada alat 2-3 jam.

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Electrical Energy Steam Boiler Heat Loss Analysis in Japfa Comfeed Indonesia Tbk, Unit of Sidoarjo

JOURNAL OF SCIENCE AND APPLIED ENGINEERING ◽

10.31328/jsae.v1i2.893 ◽

2018 ◽

Vol 1 (2) ◽

Author(s):

Joseph Priyandana ◽

Jamaaluddin Jamaaluddin

Keyword(s):

Heat Loss ◽

Animal Feed ◽

Electrical Energy ◽

Operating Costs ◽

Steam Boiler ◽

Android Application ◽

Loss Analysis ◽

Feed Industry ◽

Calculation Process ◽

Electricity Costs

In the animal feed industry, steam is used in pellet making machines. In this process, steam from the boiler is distributed to the pellet mill through the pipe. The purpose of this study is to observe the waste of electricity costs of operating a boiler by calculating heat loss in a distribution pipe. The method of assessing heat loss is done by calculating losses caused by heat loss in the boiler distribution. Then make a calculation application model based on the data obtained. From the data analyzed, the amount of heat lost in the non-insulating distribution pipe is 0.766 kJ/s with a loss of Rp 5.628,600 operating costs per month compared to heat loss in an isolated pipe condition of 0.047 kJ/s with losses which cost slightly more than Rp 368 190 / month. This heat loss calculation process is made on an android application by entering the calculation formula on the program and the data that has been obtained.

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Improving Natural Draft Cooling Tower Performance With Heat Injection

2002 International Joint Power Generation Conference ◽

10.1115/ijpgc2002-26028 ◽

2002 ◽

Cited By ~ 1

Author(s):

Eugene Grindle ◽

John Cooper ◽

Roger Lawson

Keyword(s):

Water Temperature ◽

Computer Model ◽

Cooling Tower ◽

Ambient Air ◽

Combined Cycle ◽

Steam Boiler ◽

Natural Draft ◽

Circulating Water ◽

Vapor Stream ◽

Heat Injection

This paper presents an assessment of heat injection as a means of improving natural draft cooling tower performance. The concept involves injecting heat into the cooling tower exit air/vapor stream immediately above the drift eliminators in order to increase the difference between the density of the exit air/vapor stream and the ambient air. The density difference between the air/vapor in the cooling tower stack and the ambient air is the engine that drives airflow through the cooling tower. The enhancement of the airflow through the cooling tower (the natural draft) results in more evaporation and thus lowers the circulating water temperature. Because the heat is injected above the drift eliminators, it does not heat the circulating water. To evaluate the cooling tower performance improvement as a function of heat injection rate, a thermal/aerodynamic computer model of Entergy’s White Bluff 1 & 2 and Independence 1 & 2 (approximately 840 MW each) natural draft cooling towers was developed. The computer model demonstrated that very substantial reductions in cold water temperature (up to 7°F) are obtainable by the injection of heat. This paper also discusses a number of possible heat sources. Sources of heat covered include extraction steam, auxiliary steam, boiler blow-down, and waste heat from a combustion turbine. The latter source of heat would create a combined cycle unit with the combination taking place in the condensing part of the cycle (bottom of the cycle) instead of the steam portion of the cycle (top of the cycle).

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The PID control system of steam boiler drum water level based on genetic algorithms

Proceedings of 2014 IEEE Chinese Guidance, Navigation and Control Conference ◽

10.1109/cgncc.2014.7007482 ◽

2014 ◽

Author(s):

R. X. Zhao ◽

X. J. Wang ◽

F. Teng

Keyword(s):

Genetic Algorithms ◽

Control System ◽

Water Level ◽

Pid Control ◽

Steam Boiler ◽

Boiler Drum

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Study on a Practical Case of Cleaner Production Audit

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.424-425.1334 ◽

2012 ◽

Vol 424-425 ◽

pp. 1334-1337

Author(s):

Rong Jun Su

Keyword(s):

Sewage Treatment ◽

Social Benefit ◽

Cleaner Production ◽

Raw Material ◽

Practical Case ◽

Steam Boiler ◽

Existing Problems ◽

High Efficient ◽

Total Investment ◽

Treatment Facilities

Through the extensive research and deep analysis of existing problems in cleaner production, four middle/high expense plans were set forth, demonstrated and implemented. These four implement plans included high efficient steam traps, energy saving system of steam boiler, improved sewage treatment facilities and vacuum raw material feeder. The total investment was 330 thousand Yuan RMB. The annual discharge of waste water was reduced by about 30 thousand tons and annual economic profit was 680 thousand Yuan RMB. Moreover, better environmental and social benefit was created. More importantly, a sustainable cleaner production mechanism was established for the factory.

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