scholarly journals The analytical assessment of heat calculation methods of DKVr-10-13 liquid fueled steam boilers

2020 ◽  
Vol 17 (6) ◽  
pp. 171-178
Author(s):  
V. A. Yakovlev ◽  
◽  
I. Yu. Gilev ◽  
V. N. Yurchenko ◽  
M. A. Kocheva ◽  
...  
Keyword(s):  
Boiler House ◽  
Thermal Engineering ◽  
Steam Boiler ◽  
Russian Scientific ◽  
Operational Tests ◽  
Steam Boilers ◽  
Analytical Assessment ◽  
Industrial Boiler ◽  
Heat Calculation ◽  
Research And Design

The article presents an analytical assessment of the methodology of the last two editions for boiler units` heat calculation developed by two Russian scientific research institutes - All-Russia Thermal Engineering Institute (VTI) and I. I. Polzunov Scientific and Development Association on Research and Design of Power Equipment (TsKTI). The methods` comparison analysis was carried out using the author’s calculation programs, compiled according to the last two editions, and the results collating was carried out based on the maps of operational tests of the DKVr-10-13 steam boiler installed in the heating and industrial boiler house in St. Petersburg. The main balance values and specific performance indicators of the DKVr-10-13 boiler unit were subjected to comparative analysis, the dependencies of which are presented and analyzed in the article.

scholarly journals Estimation of the coal fired heat plant energy efficiency increase after heat recovery from flue gas cooling down below the dew point

2019 ◽  
Vol 82 ◽  
pp. 01003
Author(s):  
Piotr Ostrowski ◽  
Filip Szelejewski
Keyword(s):  
Energy Efficiency ◽  
Flue Gas ◽  
Boiler House ◽  
Dew Point ◽  
Hard Coal ◽  
Steam Boiler ◽  
Gas Treatment ◽  
Efficiency Increase ◽  
Steam Boilers ◽  
Gas Cooling

The paper shows a method of the assessment of the energy efficiency of a modernised steam boiler house in which the thermal energy is recovered due to cooling of the flue gas below dew point. In addition to the energy recovery the modernisation also consists of a wet flue gas treatment that ensures a reduction in emissions of particulates and acidic gas. The publication presents the correct and simple indicator for the assessment of improvement of energy efficiency. Additionally some recommendations based on the example of settlement of savings made in hard coal heating plant, equipped with three steam boilers, fire-tube type, with a capacity of 3x3.0 t/h, operating with quasi-constant output during the year are shown.

Availability Analysis of a Steam Boiler in Textile Process Industries Using Failure and Repair Data: A Case Study

2020 ◽  
Author(s):  
Suyog Patil ◽  
Anand Bewoor ◽  
Rajkumar Patil
Keyword(s):  
Preventive Maintenance ◽  
Water System ◽  
Feed Water ◽  
Steam Boiler ◽  
Combustion System ◽  
Blow Down ◽  
Process Industries ◽  
Availability Analysis ◽  
Steam Boilers ◽  
Ram Analysis

Abstract The demand of steam in process industries is increasing rapidly, and this demand can be met by increasing the capacity utilization of steam boilers. Many of the process industries depend on industrial steam boilers as a vital component for their operation. The availability of the boiler can be improved by identifying critical mechanical sub-systems/components concerning failure frequency, reliability, and maintainability and minimizing their likelihood of occurrences. The selection of appropriate technique for data collection and reliability analysis is essential. The time between failure (TBF) and time to repair (TTR) of all components and sub-systems were collected to carry out Reliability, Availability and Maintainability (RAM) analysis. The best-fit distribution and distribution parameters were calculated using ReliaSoft software Weibull++10 after performing trend testing. The preventive maintenance intervals of all components and sub-systems and the availability of the system were evaluated. The analysis reveals that the combustion system, feed-water system, and blow-down system are the critical sub-systems from a reliability perspective and are still the biggest reasons for the boiler downtime. The research study also showed that TTR was longer for the combustion system than the other sub-systems, and thus, to enhance its availability, it is suggested that maintenance resources should be allocated at the appropriate moment to the combustion system. The study also shows the usage of RAM analysis in deciding the preventive maintenance intervals of components/sub-systems of the boiler. It also provides a reference for the preparation of the maintenance plan for the boiler system.

scholarly journals STEAM BOILER CONTROL SYSTEM USING TENSOR ANALYSIS METHODS

2019 ◽  
pp. 147-154
Author(s):  
Viktor Sidletskyi
Keyword(s):  
Structural Unit ◽  
Heat Energy ◽  
Tensor Analysis ◽  
Diagonal Form ◽  
Tensor Model ◽  
Steam Boiler ◽  
Current State ◽  
Input And Output ◽  
Steam Boilers ◽  
The Individual

Approaches to the control of steam boilers are analyzed in the article. It is recommended to use the method of tensor analysis for identification of the current state of the heat-energy process for conducting regulating action. It is suggested that the vectors of the input and output variables of the technological process with a tensor are to be connected, which for orthonormal systems adopts a diagonal form that facilitates the calculation of regulating actions. This article presents the results of simulation when traditional methods of calculating the coefficients of the regulator are used and the calculation of the regulating action using a tensor model. The use of such a technique allows conducting the necessary regulating actions taking into account the operation of the individual apparatus. So, its operation is coordinated as a structural unit in the technological line in case of occurrence of deviations and transients.

scholarly journals A Method for Determining the Usability Potential of Ship Steam Boilers

2016 ◽  
Vol 23 (4) ◽  
pp. 105-111 ◽  
Author(s):  
Łukasz Muślewski ◽  
Michał Pająk ◽  
Bogdan Landowski ◽  
Bogdan Żół Żółtowski
Keyword(s):  
Technical System ◽  
Steam Boiler ◽  
Operational Parameters ◽  
Large Power ◽  
System A ◽  
Steam Boilers ◽  
Operational Decision Making ◽  
Complex Technical System ◽  
Rational Control ◽  
Operational Processes

Abstract Ship large-power steam boiler may serve as an example of complex critical technical system. A basis for rational control of operation of such system is knowledge on its capability of fulfilling the tasks to which it was intended. In order to make it possible to apply computer aiding to operational decision-making the capability should be described analytically. In this paper it was proposed to express the capability of ship steam boiler ( considered a complex system) to perform service tasks, by calculating components of its usability potential in a given instant t. To this end , was distinguished a set of steam boiler fundamental features which formulate space of its technical states. Values and characteristic intervals of the features were defined and this way sub-spaces of serviceability and non-serviceability states of the object in question were determined. Next, in the considered space, technical state of the boiler and its usability potential was determined. Owing to this it become possible to quantitatively express the steam boiler functioning capability which served as a basis for elaborating an algorithm for controlling the operational processes of a complex technical system under action. In this paper is also described a way of application of the presented method to calculation of ship steam boiler usability potential, which may be especially instrumental in the case of operational control of the boilers of the kind , equipped with interstage reheaters, i.e. those operating with high values of operational parameters.

Biomass Externally Fired Gas Turbine Cogeneration

1996 ◽  
Vol 118 (3) ◽  
pp. 604-609 ◽  
Author(s):  
L. Eidensten ◽  
J. Yan ◽  
G. Svedberg
Keyword(s):  
Gas Turbine ◽  
Circulating Fluidized Bed ◽  
Hot Water ◽  
Biomass Combustion ◽  
Total Efficiency ◽  
Low Grade ◽  
Steam Boiler ◽  
Steam Boilers ◽  
In Series ◽  
Gas Turbine Exhaust

This paper is a presentation of a systematic study on externally fired gas turbine cogeneration fueled by biomass. The gas turbine is coupled in series with a biomass combustion furnace in which the gas turbine exhaust is used to support combustion. Three cogeneration systems have been simulated. They are systems without a gas turbine, with a non-top-fired gas turbine, and a top-fired gas turbine. For all systems, three types of combustion equipment have been selected: circulating fluidized bed (CFB) boiler, grate fired steam boiler, and grate fired hot water boiler. The sizes of biomass furnaces have been chosen as 20 MW and 100 MW fuel inputs. The total efficiencies based on electricity plus process heat, electrical efficiencies, and the power-to-heat ratios for various alternatives have been calculated. For each of the cogeneration systems, part-load performance with varying biomass fuel input is presented. Systems with CFB boilers have a higher total efficiency and electrical efficiency than other systems when a top-fired gas turbine is added. However, the systems with grate fired steam boilers allow higher combustion temperature in the furnace than CFB boilers do. Therefore, a top combustor may not be needed when high temperature is already available. Only one low-grade fuel system is then needed and the gas turbine can operate with a very clean working medium.

scholarly journals Biomass Externally Fired Gas Turbine Cogeneration

1994 ◽  
Author(s):  
Lars Eidensten ◽  
Jinyue Yan ◽  
Gunnar Svedberg
Keyword(s):  
Gas Turbine ◽  
Circulating Fluidized Bed ◽  
Hot Water ◽  
Biomass Combustion ◽  
Total Efficiency ◽  
Low Grade ◽  
Steam Boiler ◽  
Steam Boilers ◽  
In Series ◽  
Gas Turbine Exhaust

This paper is a presentation of systematic study on externally fired gas turbine cogeneration fueled by biomass. The gas turbine is coupled in series with a biomass combustion furnace in which the gas turbine exhaust is used to support combustion. Three cogeneration systems have been simulated. They are systems without a gas turbine, with a non top-fired gas turbine, and a top-fired gas turbine. For all systems, three types of combustion equipment have been selected: circulating fluidized bed (CFB) boiler, grate fired steam boiler and grate fired hot water boiler. The sizes of biomass furnaces have been chosen 20 MW and 100 MW fuel inputs. The total efficiencies based on electricity plus process heat, electrical efficiencies, and the power-to-heat ratios for various alternatives have been calculated. For each of the cogeneration systems, part load performance with varying biomass fuel input is presented. Systems with CFB boilers have a higher total efficiency and electrical efficiency than other systems when a top-fired gas turbine is added. However, the systems with grate fired steam boilers allow higher combustion temperature in the furnace than CFB boilers do. Therefore, a top combustor may not be needed when high temperature is already available. Only one low grade fuel system is then needed and the gas turbine can operate with very clean working medium.

CFD Air Flow Channel Optimization for a Low NOx Operation of a Big Steam Boiler

2007 ◽  
Author(s):  
Tudor I. Prisecaru ◽  
Elena Popa ◽  
Malina Mihaela Prisecaru
Keyword(s):  
Pressure Drop ◽  
Complex Problem ◽  
Airflow Rate ◽  
Nox Emissions ◽  
Steam Boiler ◽  
Scaled Model ◽  
Air Inlet ◽  
Steam Boilers ◽  
The Subject ◽  
Air Channels

One of the Romanian big power plant (Turceni) of 2400 MWe installed power has seven Benson boilers of 1035 t/h each, using Romanian pulverized lignite. Until 2008, every one of them has to be revamped in order to emit less than 500 mg/Nm3 of NOx at full load and 6% oxygen content in the flue gas. The problem has been very complex due to the fact that all these steam boilers have been commissioned since 1968, without any design preparation concerning low NOx emissions. Step by step, all the technological measures have been performed, so the burning process of the Romanian low heat power lignite, has been able to produce low NOx emissions by the help of supplementary stages of air injections. The last problem and the subject of the presented paper, occurred regarding the possibility to inject enough and equal airflow rate through sixteen nozzles before the end of the boiler’s furnace. The complexity of this problem consisted not only in a lot of technical constraints concerning to the starting place of the air pipes, but also to the path of the pipes (with very big dimensions) and to a very low influence in pressure drop losses towards the existent air ducts. A special supplementary problem has been that one to create the simplest shape of the air inlet elbow from the main existent air ducts, in order to suck the strictly necessary airflow rate at the lowest possible pressure drop loss. Due to the fact that the boiler’s dimensions are too big to use only one air pipe toward the nozzles, two air manifolds are considered starting from two main different air ducts and feeding eight nozzles each; this fact has complicated the task further, in order to balance the airflow rate inside the two manifolds. This complex problem has been solved by the help of CFD Fluent code and has been considered also the subject of one of the team member’s PhD dissertation. Special meshing techniques have been used in order to optimize the cells’ number. For CFD results validation a special 1:50 transparent scaled model of the furnace has been constructed and performed using a laser — Doppler anemometer to determine the airflow rate and velocity, inside the air channels and at the nozzles’ exits to the furnace.

scholarly journals KAJIAN TEKNOLOGI PEMANFAATAN BIOGAS POME (PALM OIL MILL EFFLUENT) KE BOILER

2019 ◽  
Vol 13 (1) ◽  
pp. 43-54
Author(s):  
Bambang Sucahyo ◽  
Dwi Lukman H ◽  
Rohmadi Ridlo ◽  
Tyas Puspita R ◽  
Erna Rosmala S
Keyword(s):  
Palm Oil ◽  
Valve Train ◽  
Control Panel ◽  
Piping System ◽  
Steam Boiler ◽  
Steam Boilers ◽  
Forced Draft ◽  
Gas Burner ◽  
Palm Oil Mill ◽  
And Control

In collaboration with BPPT,  PTPN V management starting in 2018 took place at the Sei Pagar  Mill PTPN V in Riau Province, planning the implementation of Biogas to Boiler technology to maximize the use of Biogas. The study aims to substitute shells for steam boilers / kettle through the scheme of using biomass POME to boilers at palm oil mills. The Utilization Model is a simple representation  of a complex process in reality. To produce the scheme the model was preceded by conducting technical studies and economic studies and comparative studies on several Mill s in Sumatra and Kalimantan. From some of the findings from the studies that were compiled, one of the most suitable models will be made that will be applied in the Sei Pagar Mill. Furthermore, from the model, still through the RISTEKDIKTI Flagship Insinas Program, it will be developed to produce Prototypes and Construction / modifications to the Existing Boiler that is applied to the Sei Pagar Mill . Utilization Model Scheme. Biogas POME to Boilers at Palm Oil Mill by applying Biogas to Boiler technology includes several components of equipment, such as: Blower, Piping System, Valve Train, Gas Burner (Single Burner), Forced Draft Fan, and Control Panel (PHB). Utilization Model. Biogas POME to Boilers at Palm Oil Mill can later be developed and implemented to support the application of Biogas to Boiler technology at Palm Oil Mills in Indonesia.Keywords: Steam Boiler / Boiler, Blower, Piping System, Valve Train, Gas Burner (Single Burner), Forced Draft Fan, and Control Panel (PHB)

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