Boiler

Selection and classification of fuel gas thermal control system fuel gas large heating boiler 1. The boiler classification thermal control system (1) electric system for an electric meter instrument cluster system consists of relays, time relays, the relay program composed of program control and interlock system; manufactured by electronic control and intelligent series or digital instruments, measuring instruments display, sound and light alarm monitoring instrumentation and control system and other components. Electric instrumentation system design experience mature, the price is cheap, but it is difficult to achieve system redundancy, remote data transmission, maintenance is more difficult, more difficult to implement advanced control methods. Electric meter system is mainly used for small boilers, but the electronic control Applications for closed-loop regulation of decreasing almost been replaced by intelligent multi-function instrument, the following sections mentioned electronic control just want to take advantage of familiar industry and the series combination of a widely used instrument that time to explain the principles of the control system configuration and (2) programmable control system programmable control system is the core of programmable logic controller (PLC). Programmable logic controllers are widely used in the initial control, since the 1990s has increased the ability of process control, the programmable logic controller in the field of process control applications more widely.

Gas oil furnace pump selection and purchase points to consider: conducting oil furnace oil furnace gas this kind, because it is one of the website product, so the knowledge and understanding of the product, at least, should achieve a comprehensive and specifically this level, so as to learn to have a good effect. Moreover, this is the basic requirement, so the following, it is better to proceed immediately, thereby, improve our learning efficiency .1. Gas oil furnace, the use of the pump, what good measure? Gas oil furnace on the large heating boiler, a pump energy saving, the pump energy is recommended to use four, because it can be recycled flue gas temperature. Further, on the main circulating pump, the flow rate can be appropriately increased, thereby improving the heat exchange efficiency inside the boiler, in turn, to achieve air and save energy both goals. 2. The expansion tank of gas conducting oil furnace, the oil level is much more appropriate? In addition, its purchase, to pay attention to what? Gas oil furnace in the expansion tank, the appropriate oil level, is two-thirds the height of the expansion tank, and, to ensure that overflow does not occur the problem. And the purchase of products, in general, is to consider the use area, manufacturers and service qualification, and the use of these requirements and the environment. Through them, to choose the right products.

To further promote air pollution control tough fight, push the air quality continues to improve, according to "Zhengzhou City, the 2018 campaign of air pollution control plan" and "Chung Dong New Area, the 2018 campaign of air pollution control plan" requirements, the area to carry natural gas large heating boiler low nitrogen renovation work, hereby notify the relevant issues as follows:

(1) before the end of September 2018, Eastern 4 tons of steam boiler and above the implementation of low-nitrogen gas engineering construction and renovation. Encourage the implementation of other gas-fired low-nitrogen transformation.

Promote the transformation of low nitrogen gas boiler according to early completion, and more reward principles, decreasing year by year funding award up mode. Before the end of June 2018 to complete the construction of low-nitrogen transformation, the concentration of nitrogen oxide emissions or else higher than 30 mg / cubic meters of gas boilers, carried out in accordance with the award make up 40% of equipment investment; before the end of September 2018, to complete the low nitrogen renovation project construction, the concentration of nitrogen oxide emissions or else higher than 30 mg / cubic meters of gas boilers, carried out in accordance with the award make up 30% of equipment investment; before the end of April 2019 to complete the project construction and renovation of low-nitrogen, nitrogen oxides Or emission concentration higher than 30 mg / cubic meters of gas boilers, carried out in accordance with the award make up 15% of equipment investment;

After construction is completed, the project in a timely manner to submit an application to the territorial review township (town) office: the township (town) office on a preliminary review of the whole process of the project, the project area through on-site verification of materials (including: project implementation plan, completion report, monitoring reports, on-site verification opinions, etc.) reported the construction of the Environmental Protection agency, the EPA reported by the construction of the Municipal Environmental Protection Bureau atmosphere, the atmosphere at the Municipal Environmental Protection Bureau organizations to monitor third-party monitoring mechanism for acceptance, qualified after monitoring the municipal government finance awards complement funds, unqualified deadline for rectification.

2, tightness test

Indoor gas boiler pipes tightness test should be consistent with the following requirements:

① low pressure gas pipe test pressure boiler for planning a pressure not less than 5kPa, under the experimental pressure regulator least 30min, and view all the joint with the blowing agent, no leakage, no pressure gauge pressure drop qualified equipment. When the experimental system stainless steel corrugated hose, plastic composite pipe, oil hose, when the plastic cover brass, IH pressure not less than the experiment, in addition to sealing the respective view point, the end surface of the cladding layer should also whether there is leakage phenomenon View.

② medium pressure gas pipelines boiler pressure test planning more pressure and not less than 0.1Mpa. Under the experimental pressure regulator less than 2h, and view all joints with a blowing agent, no leakage, no pressure drop pressure measurement device qualified.