Views: 0 Author: Sifang Boiler Publish Time: 2018-05-04 Origin: Site
1 Grasp boiler energy saving from the design source
To achieve real energy saving, we must start from the design link. Chapter 2 of the "Regulations" specifically puts forward energy-saving requirements for boiler design to ensure that boiler energy efficiency meets the requirements of specifications and standards in design, and is also the main content of energy-saving review of boiler design documents.
1.1Requirements for Design Documents
"Regulations" boiler design documents refer to design drawings, calculation books, instructions, etc. involving boiler structure, strength, materials and safety and economic performance.The energy-saving review of boiler design documents is carried out on the basis of the appraisal of boiler design documents.In the past, boiler design document identification only reviewed the safety of the boiler design, but now requires the boiler design to be also reviewed for energy efficiency.The energy-saving review of boiler design documents shall be undertaken by the inspection and testing institutions approved by the State Council's special equipment safety supervision agency.
The energy-saving review of boiler design documents is to review the design drawings, calculation books, manuals, etc. that describe or record the energy-saving performance and measures of the product.The design unit shall indicate the design energy efficiency index ( ie limit value ) of the boiler and the range of working conditions that meet the design energy efficiency on the design document.The energy-saving review of boiler design documents is to move forward, and it is forbidden to ( or industry standards ) .put into production boilers whose energy efficiency indicators do not meet the requirements of technical specifications or national standards
1.2Design requirements for boiler room systems
The requirement for the boiler room system design is to fully improve the energy utilization efficiency.It mainly includes 4the following aspects: improving net efficiency, recovering condensate water, cascade utilization of thermal energy and process layout of boiler room.The net efficiency of the boiler is the main indicator reflecting the comprehensive utilization of energy in the boiler system.In boiler thermal efficiency ( ie gross efficiency ) , to improve the net efficiency of the boiler, it is necessary to reduce the energy consumption of the boiler auxiliary machinery and the boiler's own steam consumption.the case of a certain Therefore, we require that the newly designed boiler room should use high-efficiency and energy-saving drums, induced draft fans and feed water pumps as much as possible, and adopt optimal control, reasonably match boiler auxiliary machines, and improve the net efficiency of the boiler..
It is required in the "Regulations" that the boiler room must be designed from the perspective of system energy saving, using the total energy system and thermodynamic optimization methods to carry out hierarchical combination and parameter matching of various energy-consuming equipment, and use energy according to the quality of high and low grades. energy saving purpose.
In addition, the process layout of the boiler room should ensure the safety and convenience of equipment installation, operation, maintenance and repair, and should make various pipeline processes short and simple in structure, so that the space layout of the boiler room can be used reasonably and compactly.Minimize the length of pipes, flue ducts and their number of bends to reduce flow resistance.
2 Requirements for boiler manufacturing units
2.1Obligations of Boiler Manufacturers
In the "Regulations", it is clearly stated that boiler manufacturing units shall not produce boilers that are explicitly eliminated by the national industrial policy.The boiler products produced shall be subjected to the finalized energy efficiency test according to the model, and the energy efficiency test shall be carried out by the boiler energy efficiency testing agency determined by the General Administration of Quality Supervision, Inspection and Quarantine.Industrial boilers shall be tested in accordance with the thermal efficiency test method of finalized products in the "Rules for Energy Efficiency Testing and Evaluation of Industrial Boilers"; boiler manufacturers shall provide users with energy efficiency test reports of boiler finalized products in the factory documents.
2.2Regulations on Energy Efficiency Testing of Boiler and Boiler Products
Boiler product stereotype energy efficiency test is one of the preconditions for boiler stereotype production.Products that have not been tested for energy efficiency or have not reached the energy efficiency index ( limited value ) shall not be put into mass production or use.According to the report of the energy efficiency testing agency, the state will regularly announce the companies that have passed the energy efficiency test and the catalog of products that have reached the target value and limit value of the energy efficiency index.
When the boiler stereotype test results of the boiler manufacturer are unqualified, the manufacturer should carefully analyze the reasons and revise the design documents.After review by the design document identification agency, the boiler products will be improved, and the same testing agency will re-test to confirm that the energy efficiency indicators meet the requirements, and mass production is allowed, otherwise the boiler products of this type cannot be continued to be produced.
At the same time, the testing agency shall notify the supervisory inspection agency in writing that the product does not meet the energy efficiency requirements, and assist the manufacturing unit to analyze the reasons, put forward suggestions for improvement plans, re-test the improved boiler products, and issue a boiler finalized product test report in a timely manner.The supervisory inspection agency shall not issue a supervisory inspection certificate for the product type after receiving a written notification that the boiler products of the testing agency do not meet the energy efficiency requirements, and at the same time urge the enterprise to improve the performance of the boiler products as soon as possible to meet the boiler energy efficiency requirements.
In addition, because most of the power station boilers are designed and manufactured by a single unit, the investment is large, the operating energy consumption is high, and there are strict requirements for thermal efficiency. If the energy efficiency index does not meet the requirements, the user, commissioning, manufacturing and installation units should jointly organize Experts, formulate improvement plans, and improve products to meet relevant requirements.
3 Requirements for boiler users
3.1Establish an energy-saving management system
Boiler use is the key link of boiler energy saving.Strengthening the daily management of boilers in use and carrying out regular energy efficiency testing is one of the effective measures to ensure boiler energy saving. The requirements for boiler users in the "Regulations" mainly include the following: First, establish a boiler operation management system, including routine maintenance and inspection of boilers, fuel analysis, water ( medium ) treatment, configuration and management of measuring instruments, etc.; The second is to establish a working mechanism for assessment, reward and punishment, the main purpose is to improve the energy saving awareness of management and operation personnel, and use the means of economic leverage to fully mobilize the enthusiasm of relevant management personnel and operators.
3.2Carry out regular energy efficiency testing of boilers
The boiler user shall conduct a regular energy efficiency test on the boiler in use every two years, and the test shall be carried out by a special equipment inspection and testing agency or a professional energy efficiency testing agency in the industry, which is also a new important regulation stipulated in the "Regulations".
3.3Establish boiler energy efficiency technical files
In the "Regulations", boiler users are required to establish boiler energy efficiency technical files. The main purpose is to master the energy efficiency management situation, record the relevant transformation and energy efficiency testing. Use file unified management.
3.4Strengthen the training of boiler operators
The thermal efficiency of the boiler is closely related to the operation management and operation.Since most coal-fired industrial boilers in my country have a low degree of automation, and the monitoring of operating conditions and combustion adjustment are more affected by human factors, the fourth chapter of the "Regulations" in the use management requires boiler users to strengthen the management of boiler operation and management. Energy-saving knowledge training for operators, so that relevant personnel are familiar with the national industrial boiler energy-saving norms and standards, and operate in strict accordance with the regulations.In order to promote the improvement of the energy saving level of boiler operators, the quality supervision department has increased the knowledge content about energy saving when assessing boiler operators.
3.5Strengthen the inspection of the daily operation status of the boilers in use
As mentioned above, strengthening the inspection of the daily operation status of the boiler is one of the important measures to ensure the energy efficiency of the boiler. The "Regulations" stipulate that the main contents of regular inspection and monitoring of boilers in use include : compliance of boiler fuel, fuel consumption, medium outlet temperature and pressure, boiler make-up water volume and make-up water temperature, exhaust gas temperature, furnace wall surface temperature, Whether the system is running, running, dripping, leaking, etc.
For qualified industrial boiler users, the operating energy efficiency of the boiler and its system should also be regularly evaluated.Through the statistics, calculation and analysis of the amount of steam generated or output heat, fuel, electricity and water consumption measurement data of industrial boilers and their systems within a certain operating cycle, the overall evaluation of their energy efficiency status is carried out. and Evaluation Rules.If the unit does not have the evaluation conditions, it can entrust the boiler energy saving professional service organization or the energy efficiency testing organization to carry out.The evaluation cycle can generally be carried out in one year or one heating season.
4 Requirements for boiler energy efficiency testing
4.1Requirements for Supervisory Inspection of Boiler Production Links
In accordance with the provisions of the (( Regulations), in the boiler manufacturing, installation, renovation and major maintenance activities, supervisory inspections should be carried out on energy-saving requirements. First, during the manufacturing supervision and inspection, it is necessary to verify the report of the energy-saving review of the boiler design documents, the boiler The product thermal efficiency test report ( the energy efficiency test of the finalized product has been carried out ) , confirming that the energy efficiency index of the boiler product meets the requirements of the boiler energy saving technical specification, and the boiler product and auxiliary machine products are not the products that are explicitly eliminated by the state. Second, during the installation supervision and inspection, it is confirmed that the Items with energy efficiency performance meet the design requirements, such as coal feeding device, grate, furnace arch, ash cleaning device, combustion control system, monitoring instrument, test hole, etc. Items conform to the design drawings. It is found that the boiler body or system does not conform to relevant boiler energy-saving technologies When required by the specification, the boiler installation unit should be notified in time to make rectification, and if necessary, the energy efficiency test should be carried out for boilers that have already undergone the energy efficiency test of the boiler. ( or major maintenance ) plan to verify that the renovation or major maintenance project will not reduce the original energy efficiency index of the boiler and its system. If the renovation or major maintenance of the boiler may lead to a change in the energy efficiency of the boiler and its system, the boiler user shall ( or Entrust a competent institution ) to conduct energy efficiency tests or evaluations to understand the changes in the energy efficiency of boilers and their systems, and take corresponding measures.
4.2Requirements for Energy Efficiency Testing of In-Service Boilers
Doing a good job of regular energy efficiency testing of boilers in use is an important system for energy-saving supervision of special equipment and a necessary means to ensure energy-saving operation of boilers.During the operation of the boiler, due to the influence of various factors such as management, operator operation, equipment itself, fuel, etc., the energy efficiency index of the boiler may change, or it may not meet the requirements of specifications and standards. In order to avoid the factors affecting the energy efficiency index gradually expand , energy efficiency monitoring should be carried out on a regular basis, these existing problems should be discovered in time through regular energy efficiency tests, and corresponding measures should be taken to deal with them to ensure the safe and economical operation of the boiler.
Periodic energy efficiency tests are carried out on industrial boilers in use, and a simple test method for thermal efficiency under boiler operating conditions is adopted in accordance with the "Rules for Energy Efficiency Testing and Evaluation of Industrial Boilers".The so-called simple test method is to use the reverse balance method to test under the operating conditions of the boiler.The measurement items are carried out in accordance with the of "Industrial Boiler Thermal Performance Test Regulations" (GB / Tl0180-2003 ) .When the energy efficiency result is lower than requirements the Regulations A of the % of the limit value in Annex 90, or the user requires energy-saving diagnosis of the boiler - k should be tested by the detailed test method of thermal efficiency under boiler operating conditions to accurately evaluate its energy efficiency status.For boilers that do not meet the energy efficiency indicators, or operate at low efficiency for a long time, the user should analyze the reasons, conduct necessary diagnosis, and take targeted measures to rectify.
2011 is the first year of the "Twelfth Five-Year", and it is particularly critical to do a good job of energy-saving special equipment with high energy consumption.We must comprehensively promote the energy-saving supervision of boilers, continue to strengthen the infrastructure for energy-saving supervision of high-energy-consuming special equipment, explore new models of energy-saving supervision, and promote the development of new energy-saving industries for high-energy-consuming special equipment, so as to save energy for special equipment during the "Twelfth Five-Year Plan" period. The work will lay a solid foundation and make new contributions to the construction of a resource-saving and environment-friendly society.