Energy-saving deoxidation system of industrial boiler

Abstract

The invention provides an energy-saving deoxidation system of an industrial boiler. The system comprises a soft water tank, a deoxidation pump, an ejector, a mixing pipe, an analyzer and at least two deoxidation combined bodies, wherein any one of the deoxidation combined bodies comprises a heater, a reactor and a heat exchanger which are sequentially connected end to end; and the water outlet of the soft water tank is connected with the deoxidation pump, the heat exchangers of the deoxidation pump and the deoxidation combined bodies are connected with the water inlet of the ejector, the water outlet of the ejector is connected with the water inlet of the analyzer through the mixing pipe, the water outlet of the analyzer is connected to the industrial boiler through a water supplementing pump, and a steam outlet is connected with a steam-water separator. The steam-water separator is provided with a water exhaust port and a gas exhaust port. The gas exhaust port is connected with the heat exchanger of the deoxidation combined body. The system provided by the invention based on henry's law is low in energy consumption and convenient to maintain.

Description

technical field [0001] The invention relates to an industrial boiler water treatment system, in particular to a novel energy-saving industrial boiler deaeration system. Background technique [0002] The existence of dissolved oxygen in water is the main reason for the corrosion of boilers, heat exchangers and heating network pipes. This corrosion has caused a serious waste of energy and funds, and at the same time has buried hidden dangers for the safe operation of equipment. For this reason, the national "Industrial Boiler Water Quality" standard (GB / T1576-2008) puts forward clear requirements for the assembly of boiler feed water deaeration devices. In addition, the oxygen corrosion of equipment and pipelines in the heat exchange network of chemical and fertilizer industries is also caused by the high dissolved oxygen content in water. This kind of corrosion has plagued technicians in various industries for many years and seriously affected the improvement of their energy-...

AI Technical Summary

Problems solved by technology

Early equipment was regenerated with diammonium. Due to the high toxicity of diammonium, the steam and hot water produced by boilers using this deaeration method must not come into contact with the human body, let alone drinking water and food. It is also harmful to the operators themselves. Certain unsafe factors, the current method has basically been eliminated

In recent years, some scientific and technical personnel have developed new resin oxygen removal equipment, but because the regeneration method of resin is limited, the oxygen removal effect is difficult to meet the standard; and the unsafe factors of resin have not been resolved

[0006] Some manufacturers have also developed resin deaerators using sodium sulfite as a regenerant, but limited to the regeneration effect, the equipment needs to be activated with diammonium after a certain period of regeneration; and the regeneration process is more complicated and cumbersome, and the water consumption after regeneration is relatively large; so its promotion is limited

[0007] 4) Iron filings deoxidation and sponge iron deoxidation: Iron filings deoxidation is a deoxidation method proposed in the early stage. The principle is simple and easy to implement, but there are shortcomings such as unstable deoxidation effect, and there has been no major improvement in technology after many years , so it is basically eliminated; in recent years, on the basis of the same principle, a new type of sponge iron deoxidation has been developed, which makes full use of the structural characteristics of sponge iron to remove dissolved oxygen in water. The oxygen effect is difficult to reach the standard stably

However, this method has certain requirements for the technology itself, the initial investment is high, and the domestic application is less

[0010] 7) Henry's law deoxygenation: based on Henry's law, the oxygen-free gas is strongly mixed with oxygen-containing water, so that the oxygen dissolved in the water is precipitated into the gas, so that the feed water meets the water quality requirements; Henry's law is used in the deaeration of feed water The application of this technology was first proposed by European scientific and technical personnel. The early equipment placed the reactor in the boiler flue for heating. Due to the disadvantages of difficult temperature control and other shortcomings, its application and promotion have been greatly limited.

[0011] To sum up, due to the deficiencies in the operation of traditional deaeration equipment, they cannot meet the needs of users in many cases, or consume too much energy, or have a great impact on water quality, and are not easy for users to maintain. The development of technology is gaining attention

Images